Precalculus Examples

$\sin (4 x) \cos (6 x)$

Step 1

Factor $2$ out of $4 x$ .

$\sin (2 (2 x)) \cos (6 x)$

Step 2

Apply the sine double-angle identity.

$2 (2 \sin (x) \cos (x)) \cos (2 x) \cos (6 x)$

Step 3

Multiply $2$ by $2$ .

$4 (\sin (x) \cos (x)) \cos (2 x) \cos (6 x)$

Step 4

Use the double-angle identity to transform $\cos (2 x)$ to $2 \cos^{2} (x) - 1$ .

$4 \sin (x) \cos (x) (2 \cos^{2} (x) - 1) \cos (6 x)$

Step 5

Apply the distributive property.

$(4 \sin (x) \cos (x) (2 \cos^{2} (x)) + 4 \sin (x) \cos (x) \cdot - 1) \cos (6 x)$

Step 6

Multiply $\cos (x)$ by $\cos^{2} (x)$ by adding the exponents.

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Step 6.1

Move $\cos^{2} (x)$ .

$(4 \sin (x) (\cos^{2} (x) \cos (x)) \cdot 2 + 4 \sin (x) \cos (x) \cdot - 1) \cos (6 x)$

Step 6.2

Multiply $\cos^{2} (x)$ by $\cos (x)$ .

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Step 6.2.1

Raise $\cos (x)$ to the power of $1$ .

$(4 \sin (x) (\cos^{2} (x) \cos^{1} (x)) \cdot 2 + 4 \sin (x) \cos (x) \cdot - 1) \cos (6 x)$

Step 6.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$(4 \sin (x) {\cos (x)}^{2 + 1} \cdot 2 + 4 \sin (x) \cos (x) \cdot - 1) \cos (6 x)$

Step 6.3

Add $2$ and $1$ .

$(4 \sin (x) \cos^{3} (x) \cdot 2 + 4 \sin (x) \cos (x) \cdot - 1) \cos (6 x)$

Step 7

Simplify terms.

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Step 7.1

Multiply $- 1$ by $4$ .

$(4 \sin (x) \cos^{3} (x) \cdot 2 - 4 \sin (x) \cos (x)) \cos (6 x)$

Step 7.2

Simplify with factoring out.

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Step 7.2.1

Multiply $2$ by $4$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) \cos (6 x)$

Step 7.2.2

Factor $2$ out of $6 x$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) \cos (2 (3 x))$

Step 7.3

Simplify each term.

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Step 7.3.1

Use the triple-angle identity to transform $\cos (3 x)$ to $4 \cos^{3} (x) - 3 \cos (x)$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) ({(4 \cos^{3} (x) - 3 \cos (x))}^{2} - \sin^{2} (3 x))$

Step 7.3.2

Rewrite ${(4 \cos^{3} (x) - 3 \cos (x))}^{2}$ as $(4 \cos^{3} (x) - 3 \cos (x)) (4 \cos^{3} (x) - 3 \cos (x))$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) ((4 \cos^{3} (x) - 3 \cos (x)) (4 \cos^{3} (x) - 3 \cos (x)) - \sin^{2} (3 x))$

Step 7.3.3

Expand $(4 \cos^{3} (x) - 3 \cos (x)) (4 \cos^{3} (x) - 3 \cos (x))$ using the FOIL Method.

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Step 7.3.3.1

Apply the distributive property.

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (4 \cos^{3} (x) (4 \cos^{3} (x) - 3 \cos (x)) - 3 \cos (x) (4 \cos^{3} (x) - 3 \cos (x)) - \sin^{2} (3 x))$

Step 7.3.3.2

Apply the distributive property.

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (4 \cos^{3} (x) (4 \cos^{3} (x)) + 4 \cos^{3} (x) (- 3 \cos (x)) - 3 \cos (x) (4 \cos^{3} (x) - 3 \cos (x)) - \sin^{2} (3 x))$

Step 7.3.3.3

Apply the distributive property.

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (4 \cos^{3} (x) (4 \cos^{3} (x)) + 4 \cos^{3} (x) (- 3 \cos (x)) - 3 \cos (x) (4 \cos^{3} (x)) - 3 \cos (x) (- 3 \cos (x)) - \sin^{2} (3 x))$

Step 7.3.4

Simplify and combine like terms.

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Step 7.3.4.1

Simplify each term.

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Step 7.3.4.1.1

Rewrite using the commutative property of multiplication.

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (4 \cdot 4 \cos^{3} (x) \cos^{3} (x) + 4 \cos^{3} (x) (- 3 \cos (x)) - 3 \cos (x) (4 \cos^{3} (x)) - 3 \cos (x) (- 3 \cos (x)) - \sin^{2} (3 x))$

Step 7.3.4.1.2

Multiply $\cos^{3} (x)$ by $\cos^{3} (x)$ by adding the exponents.

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Step 7.3.4.1.2.1

Move $\cos^{3} (x)$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (4 \cdot 4 (\cos^{3} (x) \cos^{3} (x)) + 4 \cos^{3} (x) (- 3 \cos (x)) - 3 \cos (x) (4 \cos^{3} (x)) - 3 \cos (x) (- 3 \cos (x)) - \sin^{2} (3 x))$

Step 7.3.4.1.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (4 \cdot 4 {\cos (x)}^{3 + 3} + 4 \cos^{3} (x) (- 3 \cos (x)) - 3 \cos (x) (4 \cos^{3} (x)) - 3 \cos (x) (- 3 \cos (x)) - \sin^{2} (3 x))$

Step 7.3.4.1.2.3

Add $3$ and $3$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (4 \cdot 4 \cos^{6} (x) + 4 \cos^{3} (x) (- 3 \cos (x)) - 3 \cos (x) (4 \cos^{3} (x)) - 3 \cos (x) (- 3 \cos (x)) - \sin^{2} (3 x))$

Step 7.3.4.1.3

Multiply $4$ by $4$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) + 4 \cos^{3} (x) (- 3 \cos (x)) - 3 \cos (x) (4 \cos^{3} (x)) - 3 \cos (x) (- 3 \cos (x)) - \sin^{2} (3 x))$

Step 7.3.4.1.4

Multiply $\cos^{3} (x)$ by $\cos (x)$ by adding the exponents.

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Step 7.3.4.1.4.1

Move $\cos (x)$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) + 4 (\cos (x) \cos^{3} (x)) \cdot - 3 - 3 \cos (x) (4 \cos^{3} (x)) - 3 \cos (x) (- 3 \cos (x)) - \sin^{2} (3 x))$

Step 7.3.4.1.4.2

Multiply $\cos (x)$ by $\cos^{3} (x)$ .

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Step 7.3.4.1.4.2.1

Raise $\cos (x)$ to the power of $1$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) + 4 (\cos^{1} (x) \cos^{3} (x)) \cdot - 3 - 3 \cos (x) (4 \cos^{3} (x)) - 3 \cos (x) (- 3 \cos (x)) - \sin^{2} (3 x))$

Step 7.3.4.1.4.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) + 4 {\cos (x)}^{1 + 3} \cdot - 3 - 3 \cos (x) (4 \cos^{3} (x)) - 3 \cos (x) (- 3 \cos (x)) - \sin^{2} (3 x))$

Step 7.3.4.1.4.3

Add $1$ and $3$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) + 4 \cos^{4} (x) \cdot - 3 - 3 \cos (x) (4 \cos^{3} (x)) - 3 \cos (x) (- 3 \cos (x)) - \sin^{2} (3 x))$

Step 7.3.4.1.5

Multiply $- 3$ by $4$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 12 \cos^{4} (x) - 3 \cos (x) (4 \cos^{3} (x)) - 3 \cos (x) (- 3 \cos (x)) - \sin^{2} (3 x))$

Step 7.3.4.1.6

Multiply $\cos (x)$ by $\cos^{3} (x)$ by adding the exponents.

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Step 7.3.4.1.6.1

Move $\cos^{3} (x)$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 12 \cos^{4} (x) - 3 (\cos^{3} (x) \cos (x)) \cdot 4 - 3 \cos (x) (- 3 \cos (x)) - \sin^{2} (3 x))$

Step 7.3.4.1.6.2

Multiply $\cos^{3} (x)$ by $\cos (x)$ .

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Step 7.3.4.1.6.2.1

Raise $\cos (x)$ to the power of $1$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 12 \cos^{4} (x) - 3 (\cos^{3} (x) \cos^{1} (x)) \cdot 4 - 3 \cos (x) (- 3 \cos (x)) - \sin^{2} (3 x))$

Step 7.3.4.1.6.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 12 \cos^{4} (x) - 3 {\cos (x)}^{3 + 1} \cdot 4 - 3 \cos (x) (- 3 \cos (x)) - \sin^{2} (3 x))$

Step 7.3.4.1.6.3

Add $3$ and $1$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 12 \cos^{4} (x) - 3 \cos^{4} (x) \cdot 4 - 3 \cos (x) (- 3 \cos (x)) - \sin^{2} (3 x))$

Step 7.3.4.1.7

Multiply $4$ by $- 3$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 12 \cos^{4} (x) - 12 \cos^{4} (x) - 3 \cos (x) (- 3 \cos (x)) - \sin^{2} (3 x))$

Step 7.3.4.1.8

Multiply $- 3 \cos (x) (- 3 \cos (x))$ .

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Step 7.3.4.1.8.1

Multiply $- 3$ by $- 3$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 12 \cos^{4} (x) - 12 \cos^{4} (x) + 9 \cos (x) \cos (x) - \sin^{2} (3 x))$

Step 7.3.4.1.8.2

Raise $\cos (x)$ to the power of $1$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 12 \cos^{4} (x) - 12 \cos^{4} (x) + 9 (\cos^{1} (x) \cos (x)) - \sin^{2} (3 x))$

Step 7.3.4.1.8.3

Raise $\cos (x)$ to the power of $1$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 12 \cos^{4} (x) - 12 \cos^{4} (x) + 9 (\cos^{1} (x) \cos^{1} (x)) - \sin^{2} (3 x))$

Step 7.3.4.1.8.4

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 12 \cos^{4} (x) - 12 \cos^{4} (x) + 9 {\cos (x)}^{1 + 1} - \sin^{2} (3 x))$

Step 7.3.4.1.8.5

Add $1$ and $1$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 12 \cos^{4} (x) - 12 \cos^{4} (x) + 9 \cos^{2} (x) - \sin^{2} (3 x))$

Step 7.3.4.2

Subtract $12 \cos^{4} (x)$ from $- 12 \cos^{4} (x)$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - \sin^{2} (3 x))$

Step 7.3.5

Apply the sine triple-angle identity.

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - {(- 4 \sin^{3} (x) + 3 \sin (x))}^{2})$

Step 7.3.6

Rewrite ${(- 4 \sin^{3} (x) + 3 \sin (x))}^{2}$ as $(- 4 \sin^{3} (x) + 3 \sin (x)) (- 4 \sin^{3} (x) + 3 \sin (x))$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - ((- 4 \sin^{3} (x) + 3 \sin (x)) (- 4 \sin^{3} (x) + 3 \sin (x))))$

Step 7.3.7

Expand $(- 4 \sin^{3} (x) + 3 \sin (x)) (- 4 \sin^{3} (x) + 3 \sin (x))$ using the FOIL Method.

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Step 7.3.7.1

Apply the distributive property.

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (- 4 \sin^{3} (x) (- 4 \sin^{3} (x) + 3 \sin (x)) + 3 \sin (x) (- 4 \sin^{3} (x) + 3 \sin (x))))$

Step 7.3.7.2

Apply the distributive property.

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (- 4 \sin^{3} (x) (- 4 \sin^{3} (x)) - 4 \sin^{3} (x) (3 \sin (x)) + 3 \sin (x) (- 4 \sin^{3} (x) + 3 \sin (x))))$

Step 7.3.7.3

Apply the distributive property.

Step 7.3.8

Simplify and combine like terms.

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Step 7.3.8.1

Simplify each term.

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Step 7.3.8.1.1

Rewrite using the commutative property of multiplication.

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (- 4 \cdot - 4 \sin^{3} (x) \sin^{3} (x) - 4 \sin^{3} (x) (3 \sin (x)) + 3 \sin (x) (- 4 \sin^{3} (x)) + 3 \sin (x) (3 \sin (x))))$

Step 7.3.8.1.2

Multiply $\sin^{3} (x)$ by $\sin^{3} (x)$ by adding the exponents.

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Step 7.3.8.1.2.1

Move $\sin^{3} (x)$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (- 4 \cdot - 4 (\sin^{3} (x) \sin^{3} (x)) - 4 \sin^{3} (x) (3 \sin (x)) + 3 \sin (x) (- 4 \sin^{3} (x)) + 3 \sin (x) (3 \sin (x))))$

Step 7.3.8.1.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (- 4 \cdot - 4 {\sin (x)}^{3 + 3} - 4 \sin^{3} (x) (3 \sin (x)) + 3 \sin (x) (- 4 \sin^{3} (x)) + 3 \sin (x) (3 \sin (x))))$

Step 7.3.8.1.2.3

Add $3$ and $3$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (- 4 \cdot - 4 \sin^{6} (x) - 4 \sin^{3} (x) (3 \sin (x)) + 3 \sin (x) (- 4 \sin^{3} (x)) + 3 \sin (x) (3 \sin (x))))$

Step 7.3.8.1.3

Multiply $- 4$ by $- 4$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (16 \sin^{6} (x) - 4 \sin^{3} (x) (3 \sin (x)) + 3 \sin (x) (- 4 \sin^{3} (x)) + 3 \sin (x) (3 \sin (x))))$

Step 7.3.8.1.4

Multiply $\sin^{3} (x)$ by $\sin (x)$ by adding the exponents.

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Step 7.3.8.1.4.1

Move $\sin (x)$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (16 \sin^{6} (x) - 4 (\sin (x) \sin^{3} (x)) \cdot 3 + 3 \sin (x) (- 4 \sin^{3} (x)) + 3 \sin (x) (3 \sin (x))))$

Step 7.3.8.1.4.2

Multiply $\sin (x)$ by $\sin^{3} (x)$ .

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Step 7.3.8.1.4.2.1

Raise $\sin (x)$ to the power of $1$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (16 \sin^{6} (x) - 4 (\sin^{1} (x) \sin^{3} (x)) \cdot 3 + 3 \sin (x) (- 4 \sin^{3} (x)) + 3 \sin (x) (3 \sin (x))))$

Step 7.3.8.1.4.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (16 \sin^{6} (x) - 4 {\sin (x)}^{1 + 3} \cdot 3 + 3 \sin (x) (- 4 \sin^{3} (x)) + 3 \sin (x) (3 \sin (x))))$

Step 7.3.8.1.4.3

Add $1$ and $3$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (16 \sin^{6} (x) - 4 \sin^{4} (x) \cdot 3 + 3 \sin (x) (- 4 \sin^{3} (x)) + 3 \sin (x) (3 \sin (x))))$

Step 7.3.8.1.5

Multiply $3$ by $- 4$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (16 \sin^{6} (x) - 12 \sin^{4} (x) + 3 \sin (x) (- 4 \sin^{3} (x)) + 3 \sin (x) (3 \sin (x))))$

Step 7.3.8.1.6

Multiply $\sin (x)$ by $\sin^{3} (x)$ by adding the exponents.

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Step 7.3.8.1.6.1

Move $\sin^{3} (x)$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (16 \sin^{6} (x) - 12 \sin^{4} (x) + 3 (\sin^{3} (x) \sin (x)) \cdot - 4 + 3 \sin (x) (3 \sin (x))))$

Step 7.3.8.1.6.2

Multiply $\sin^{3} (x)$ by $\sin (x)$ .

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Step 7.3.8.1.6.2.1

Raise $\sin (x)$ to the power of $1$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (16 \sin^{6} (x) - 12 \sin^{4} (x) + 3 (\sin^{3} (x) \sin^{1} (x)) \cdot - 4 + 3 \sin (x) (3 \sin (x))))$

Step 7.3.8.1.6.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (16 \sin^{6} (x) - 12 \sin^{4} (x) + 3 {\sin (x)}^{3 + 1} \cdot - 4 + 3 \sin (x) (3 \sin (x))))$

Step 7.3.8.1.6.3

Add $3$ and $1$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (16 \sin^{6} (x) - 12 \sin^{4} (x) + 3 \sin^{4} (x) \cdot - 4 + 3 \sin (x) (3 \sin (x))))$

Step 7.3.8.1.7

Multiply $- 4$ by $3$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (16 \sin^{6} (x) - 12 \sin^{4} (x) - 12 \sin^{4} (x) + 3 \sin (x) (3 \sin (x))))$

Step 7.3.8.1.8

Multiply $3 \sin (x) (3 \sin (x))$ .

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Step 7.3.8.1.8.1

Multiply $3$ by $3$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (16 \sin^{6} (x) - 12 \sin^{4} (x) - 12 \sin^{4} (x) + 9 \sin (x) \sin (x)))$

Step 7.3.8.1.8.2

Raise $\sin (x)$ to the power of $1$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (16 \sin^{6} (x) - 12 \sin^{4} (x) - 12 \sin^{4} (x) + 9 (\sin^{1} (x) \sin (x))))$

Step 7.3.8.1.8.3

Raise $\sin (x)$ to the power of $1$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (16 \sin^{6} (x) - 12 \sin^{4} (x) - 12 \sin^{4} (x) + 9 (\sin^{1} (x) \sin^{1} (x))))$

Step 7.3.8.1.8.4

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (16 \sin^{6} (x) - 12 \sin^{4} (x) - 12 \sin^{4} (x) + 9 {\sin (x)}^{1 + 1}))$

Step 7.3.8.1.8.5

Add $1$ and $1$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (16 \sin^{6} (x) - 12 \sin^{4} (x) - 12 \sin^{4} (x) + 9 \sin^{2} (x)))$

Step 7.3.8.2

Subtract $12 \sin^{4} (x)$ from $- 12 \sin^{4} (x)$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (16 \sin^{6} (x) - 24 \sin^{4} (x) + 9 \sin^{2} (x)))$

Step 7.3.9

Apply the distributive property.

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - (16 \sin^{6} (x)) - (- 24 \sin^{4} (x)) - (9 \sin^{2} (x)))$

Step 7.3.10

Simplify.

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Step 7.3.10.1

Multiply $16$ by $- 1$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - 16 \sin^{6} (x) - (- 24 \sin^{4} (x)) - (9 \sin^{2} (x)))$

Step 7.3.10.2

Multiply $- 24$ by $- 1$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - 16 \sin^{6} (x) + 24 \sin^{4} (x) - (9 \sin^{2} (x)))$

Step 7.3.10.3

Multiply $9$ by $- 1$ .

$(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - 16 \sin^{6} (x) + 24 \sin^{4} (x) - 9 \sin^{2} (x))$

Step 8

Expand $(8 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x)) (16 \cos^{6} (x) - 24 \cos^{4} (x) + 9 \cos^{2} (x) - 16 \sin^{6} (x) + 24 \sin^{4} (x) - 9 \sin^{2} (x))$ by multiplying each term in the first expression by each term in the second expression.

$8 \sin (x) \cos^{3} (x) (16 \cos^{6} (x)) + 8 \sin (x) \cos^{3} (x) (- 24 \cos^{4} (x)) + 8 \sin (x) \cos^{3} (x) (9 \cos^{2} (x)) + 8 \sin (x) \cos^{3} (x) (- 16 \sin^{6} (x)) + 8 \sin (x) \cos^{3} (x) (24 \sin^{4} (x)) + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9

Simplify terms.

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Step 9.1

Simplify each term.

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Step 9.1.1

Multiply $\cos^{3} (x)$ by $\cos^{6} (x)$ by adding the exponents.

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Step 9.1.1.1

Move $\cos^{6} (x)$ .

$8 \sin (x) (\cos^{6} (x) \cos^{3} (x)) \cdot 16 + 8 \sin (x) \cos^{3} (x) (- 24 \cos^{4} (x)) + 8 \sin (x) \cos^{3} (x) (9 \cos^{2} (x)) + 8 \sin (x) \cos^{3} (x) (- 16 \sin^{6} (x)) + 8 \sin (x) \cos^{3} (x) (24 \sin^{4} (x)) + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.1.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$8 \sin (x) {\cos (x)}^{6 + 3} \cdot 16 + 8 \sin (x) \cos^{3} (x) (- 24 \cos^{4} (x)) + 8 \sin (x) \cos^{3} (x) (9 \cos^{2} (x)) + 8 \sin (x) \cos^{3} (x) (- 16 \sin^{6} (x)) + 8 \sin (x) \cos^{3} (x) (24 \sin^{4} (x)) + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.1.3

Add $6$ and $3$ .

$8 \sin (x) \cos^{9} (x) \cdot 16 + 8 \sin (x) \cos^{3} (x) (- 24 \cos^{4} (x)) + 8 \sin (x) \cos^{3} (x) (9 \cos^{2} (x)) + 8 \sin (x) \cos^{3} (x) (- 16 \sin^{6} (x)) + 8 \sin (x) \cos^{3} (x) (24 \sin^{4} (x)) + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.2

Multiply $16$ by $8$ .

$128 \sin (x) \cos^{9} (x) + 8 \sin (x) \cos^{3} (x) (- 24 \cos^{4} (x)) + 8 \sin (x) \cos^{3} (x) (9 \cos^{2} (x)) + 8 \sin (x) \cos^{3} (x) (- 16 \sin^{6} (x)) + 8 \sin (x) \cos^{3} (x) (24 \sin^{4} (x)) + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.3

Multiply $\cos^{3} (x)$ by $\cos^{4} (x)$ by adding the exponents.

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Step 9.1.3.1

Move $\cos^{4} (x)$ .

$128 \sin (x) \cos^{9} (x) + 8 \sin (x) (\cos^{4} (x) \cos^{3} (x)) \cdot - 24 + 8 \sin (x) \cos^{3} (x) (9 \cos^{2} (x)) + 8 \sin (x) \cos^{3} (x) (- 16 \sin^{6} (x)) + 8 \sin (x) \cos^{3} (x) (24 \sin^{4} (x)) + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.3.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$128 \sin (x) \cos^{9} (x) + 8 \sin (x) {\cos (x)}^{4 + 3} \cdot - 24 + 8 \sin (x) \cos^{3} (x) (9 \cos^{2} (x)) + 8 \sin (x) \cos^{3} (x) (- 16 \sin^{6} (x)) + 8 \sin (x) \cos^{3} (x) (24 \sin^{4} (x)) + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.3.3

Add $4$ and $3$ .

$128 \sin (x) \cos^{9} (x) + 8 \sin (x) \cos^{7} (x) \cdot - 24 + 8 \sin (x) \cos^{3} (x) (9 \cos^{2} (x)) + 8 \sin (x) \cos^{3} (x) (- 16 \sin^{6} (x)) + 8 \sin (x) \cos^{3} (x) (24 \sin^{4} (x)) + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.4

Multiply $- 24$ by $8$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 8 \sin (x) \cos^{3} (x) (9 \cos^{2} (x)) + 8 \sin (x) \cos^{3} (x) (- 16 \sin^{6} (x)) + 8 \sin (x) \cos^{3} (x) (24 \sin^{4} (x)) + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.5

Multiply $\cos^{3} (x)$ by $\cos^{2} (x)$ by adding the exponents.

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Step 9.1.5.1

Move $\cos^{2} (x)$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 8 \sin (x) (\cos^{2} (x) \cos^{3} (x)) \cdot 9 + 8 \sin (x) \cos^{3} (x) (- 16 \sin^{6} (x)) + 8 \sin (x) \cos^{3} (x) (24 \sin^{4} (x)) + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.5.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 8 \sin (x) {\cos (x)}^{2 + 3} \cdot 9 + 8 \sin (x) \cos^{3} (x) (- 16 \sin^{6} (x)) + 8 \sin (x) \cos^{3} (x) (24 \sin^{4} (x)) + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.5.3

Add $2$ and $3$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 8 \sin (x) \cos^{5} (x) \cdot 9 + 8 \sin (x) \cos^{3} (x) (- 16 \sin^{6} (x)) + 8 \sin (x) \cos^{3} (x) (24 \sin^{4} (x)) + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.6

Multiply $9$ by $8$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) + 8 \sin (x) \cos^{3} (x) (- 16 \sin^{6} (x)) + 8 \sin (x) \cos^{3} (x) (24 \sin^{4} (x)) + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.7

Multiply $\sin (x)$ by $\sin^{6} (x)$ by adding the exponents.

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Step 9.1.7.1

Move $\sin^{6} (x)$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) + 8 (\sin^{6} (x) \sin (x)) \cos^{3} (x) \cdot - 16 + 8 \sin (x) \cos^{3} (x) (24 \sin^{4} (x)) + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.7.2

Multiply $\sin^{6} (x)$ by $\sin (x)$ .

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Step 9.1.7.2.1

Raise $\sin (x)$ to the power of $1$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) + 8 (\sin^{6} (x) \sin^{1} (x)) \cos^{3} (x) \cdot - 16 + 8 \sin (x) \cos^{3} (x) (24 \sin^{4} (x)) + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.7.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) + 8 {\sin (x)}^{6 + 1} \cos^{3} (x) \cdot - 16 + 8 \sin (x) \cos^{3} (x) (24 \sin^{4} (x)) + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.7.3

Add $6$ and $1$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) + 8 \sin^{7} (x) \cos^{3} (x) \cdot - 16 + 8 \sin (x) \cos^{3} (x) (24 \sin^{4} (x)) + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.8

Multiply $- 16$ by $8$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 8 \sin (x) \cos^{3} (x) (24 \sin^{4} (x)) + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.9

Multiply $\sin (x)$ by $\sin^{4} (x)$ by adding the exponents.

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Step 9.1.9.1

Move $\sin^{4} (x)$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 8 (\sin^{4} (x) \sin (x)) \cos^{3} (x) \cdot 24 + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.9.2

Multiply $\sin^{4} (x)$ by $\sin (x)$ .

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Step 9.1.9.2.1

Raise $\sin (x)$ to the power of $1$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 8 (\sin^{4} (x) \sin^{1} (x)) \cos^{3} (x) \cdot 24 + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.9.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 8 {\sin (x)}^{4 + 1} \cos^{3} (x) \cdot 24 + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.9.3

Add $4$ and $1$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 8 \sin^{5} (x) \cos^{3} (x) \cdot 24 + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.10

Multiply $24$ by $8$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) + 8 \sin (x) \cos^{3} (x) (- 9 \sin^{2} (x)) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.11

Multiply $\sin (x)$ by $\sin^{2} (x)$ by adding the exponents.

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Step 9.1.11.1

Move $\sin^{2} (x)$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) + 8 (\sin^{2} (x) \sin (x)) \cos^{3} (x) \cdot - 9 - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.11.2

Multiply $\sin^{2} (x)$ by $\sin (x)$ .

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Step 9.1.11.2.1

Raise $\sin (x)$ to the power of $1$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) + 8 (\sin^{2} (x) \sin^{1} (x)) \cos^{3} (x) \cdot - 9 - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.11.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) + 8 {\sin (x)}^{2 + 1} \cos^{3} (x) \cdot - 9 - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.11.3

Add $2$ and $1$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) + 8 \sin^{3} (x) \cos^{3} (x) \cdot - 9 - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.12

Multiply $- 9$ by $8$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 4 \sin (x) \cos (x) (16 \cos^{6} (x)) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.13

Multiply $\cos (x)$ by $\cos^{6} (x)$ by adding the exponents.

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Step 9.1.13.1

Move $\cos^{6} (x)$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 4 \sin (x) (\cos^{6} (x) \cos (x)) \cdot 16 - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.13.2

Multiply $\cos^{6} (x)$ by $\cos (x)$ .

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Step 9.1.13.2.1

Raise $\cos (x)$ to the power of $1$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 4 \sin (x) (\cos^{6} (x) \cos^{1} (x)) \cdot 16 - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.13.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 4 \sin (x) {\cos (x)}^{6 + 1} \cdot 16 - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.13.3

Add $6$ and $1$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 4 \sin (x) \cos^{7} (x) \cdot 16 - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.14

Multiply $16$ by $- 4$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) - 4 \sin (x) \cos (x) (- 24 \cos^{4} (x)) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.15

Multiply $\cos (x)$ by $\cos^{4} (x)$ by adding the exponents.

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Step 9.1.15.1

Move $\cos^{4} (x)$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) - 4 \sin (x) (\cos^{4} (x) \cos (x)) \cdot - 24 - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.15.2

Multiply $\cos^{4} (x)$ by $\cos (x)$ .

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Step 9.1.15.2.1

Raise $\cos (x)$ to the power of $1$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) - 4 \sin (x) (\cos^{4} (x) \cos^{1} (x)) \cdot - 24 - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.15.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) - 4 \sin (x) {\cos (x)}^{4 + 1} \cdot - 24 - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.15.3

Add $4$ and $1$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) - 4 \sin (x) \cos^{5} (x) \cdot - 24 - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.16

Multiply $- 24$ by $- 4$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) + 96 \sin (x) \cos^{5} (x) - 4 \sin (x) \cos (x) (9 \cos^{2} (x)) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.17

Multiply $\cos (x)$ by $\cos^{2} (x)$ by adding the exponents.

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Step 9.1.17.1

Move $\cos^{2} (x)$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) + 96 \sin (x) \cos^{5} (x) - 4 \sin (x) (\cos^{2} (x) \cos (x)) \cdot 9 - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.17.2

Multiply $\cos^{2} (x)$ by $\cos (x)$ .

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Step 9.1.17.2.1

Raise $\cos (x)$ to the power of $1$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) + 96 \sin (x) \cos^{5} (x) - 4 \sin (x) (\cos^{2} (x) \cos^{1} (x)) \cdot 9 - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.17.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) + 96 \sin (x) \cos^{5} (x) - 4 \sin (x) {\cos (x)}^{2 + 1} \cdot 9 - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.17.3

Add $2$ and $1$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) + 96 \sin (x) \cos^{5} (x) - 4 \sin (x) \cos^{3} (x) \cdot 9 - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.18

Multiply $9$ by $- 4$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) + 96 \sin (x) \cos^{5} (x) - 36 \sin (x) \cos^{3} (x) - 4 \sin (x) \cos (x) (- 16 \sin^{6} (x)) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.19

Multiply $\sin (x)$ by $\sin^{6} (x)$ by adding the exponents.

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Step 9.1.19.1

Move $\sin^{6} (x)$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) + 96 \sin (x) \cos^{5} (x) - 36 \sin (x) \cos^{3} (x) - 4 (\sin^{6} (x) \sin (x)) \cos (x) \cdot - 16 - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.19.2

Multiply $\sin^{6} (x)$ by $\sin (x)$ .

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Step 9.1.19.2.1

Raise $\sin (x)$ to the power of $1$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) + 96 \sin (x) \cos^{5} (x) - 36 \sin (x) \cos^{3} (x) - 4 (\sin^{6} (x) \sin^{1} (x)) \cos (x) \cdot - 16 - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.19.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) + 96 \sin (x) \cos^{5} (x) - 36 \sin (x) \cos^{3} (x) - 4 {\sin (x)}^{6 + 1} \cos (x) \cdot - 16 - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.19.3

Add $6$ and $1$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) + 96 \sin (x) \cos^{5} (x) - 36 \sin (x) \cos^{3} (x) - 4 \sin^{7} (x) \cos (x) \cdot - 16 - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.20

Multiply $- 16$ by $- 4$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) + 96 \sin (x) \cos^{5} (x) - 36 \sin (x) \cos^{3} (x) + 64 \sin^{7} (x) \cos (x) - 4 \sin (x) \cos (x) (24 \sin^{4} (x)) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.21

Multiply $\sin (x)$ by $\sin^{4} (x)$ by adding the exponents.

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Step 9.1.21.1

Move $\sin^{4} (x)$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) + 96 \sin (x) \cos^{5} (x) - 36 \sin (x) \cos^{3} (x) + 64 \sin^{7} (x) \cos (x) - 4 (\sin^{4} (x) \sin (x)) \cos (x) \cdot 24 - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.21.2

Multiply $\sin^{4} (x)$ by $\sin (x)$ .

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Step 9.1.21.2.1

Raise $\sin (x)$ to the power of $1$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) + 96 \sin (x) \cos^{5} (x) - 36 \sin (x) \cos^{3} (x) + 64 \sin^{7} (x) \cos (x) - 4 (\sin^{4} (x) \sin^{1} (x)) \cos (x) \cdot 24 - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.21.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) + 96 \sin (x) \cos^{5} (x) - 36 \sin (x) \cos^{3} (x) + 64 \sin^{7} (x) \cos (x) - 4 {\sin (x)}^{4 + 1} \cos (x) \cdot 24 - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.21.3

Add $4$ and $1$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) + 96 \sin (x) \cos^{5} (x) - 36 \sin (x) \cos^{3} (x) + 64 \sin^{7} (x) \cos (x) - 4 \sin^{5} (x) \cos (x) \cdot 24 - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.22

Multiply $24$ by $- 4$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) + 96 \sin (x) \cos^{5} (x) - 36 \sin (x) \cos^{3} (x) + 64 \sin^{7} (x) \cos (x) - 96 \sin^{5} (x) \cos (x) - 4 \sin (x) \cos (x) (- 9 \sin^{2} (x))$

Step 9.1.23

Multiply $\sin (x)$ by $\sin^{2} (x)$ by adding the exponents.

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Step 9.1.23.1

Move $\sin^{2} (x)$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) + 96 \sin (x) \cos^{5} (x) - 36 \sin (x) \cos^{3} (x) + 64 \sin^{7} (x) \cos (x) - 96 \sin^{5} (x) \cos (x) - 4 (\sin^{2} (x) \sin (x)) \cos (x) \cdot - 9$

Step 9.1.23.2

Multiply $\sin^{2} (x)$ by $\sin (x)$ .

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Step 9.1.23.2.1

Raise $\sin (x)$ to the power of $1$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) + 96 \sin (x) \cos^{5} (x) - 36 \sin (x) \cos^{3} (x) + 64 \sin^{7} (x) \cos (x) - 96 \sin^{5} (x) \cos (x) - 4 (\sin^{2} (x) \sin^{1} (x)) \cos (x) \cdot - 9$

Step 9.1.23.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) + 96 \sin (x) \cos^{5} (x) - 36 \sin (x) \cos^{3} (x) + 64 \sin^{7} (x) \cos (x) - 96 \sin^{5} (x) \cos (x) - 4 {\sin (x)}^{2 + 1} \cos (x) \cdot - 9$

Step 9.1.23.3

Add $2$ and $1$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) + 96 \sin (x) \cos^{5} (x) - 36 \sin (x) \cos^{3} (x) + 64 \sin^{7} (x) \cos (x) - 96 \sin^{5} (x) \cos (x) - 4 \sin^{3} (x) \cos (x) \cdot - 9$

Step 9.1.24

Multiply $- 9$ by $- 4$ .

$128 \sin (x) \cos^{9} (x) - 192 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 64 \sin (x) \cos^{7} (x) + 96 \sin (x) \cos^{5} (x) - 36 \sin (x) \cos^{3} (x) + 64 \sin^{7} (x) \cos (x) - 96 \sin^{5} (x) \cos (x) + 36 \sin^{3} (x) \cos (x)$

Step 9.2

Simplify by adding terms.

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Step 9.2.1

Subtract $64 \sin (x) \cos^{7} (x)$ from $- 192 \sin (x) \cos^{7} (x)$ .

$128 \sin (x) \cos^{9} (x) - 256 \sin (x) \cos^{7} (x) + 72 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) + 96 \sin (x) \cos^{5} (x) - 36 \sin (x) \cos^{3} (x) + 64 \sin^{7} (x) \cos (x) - 96 \sin^{5} (x) \cos (x) + 36 \sin^{3} (x) \cos (x)$

Step 9.2.2

Add $72 \sin (x) \cos^{5} (x)$ and $96 \sin (x) \cos^{5} (x)$ .

$128 \sin (x) \cos^{9} (x) - 256 \sin (x) \cos^{7} (x) + 168 \sin (x) \cos^{5} (x) - 128 \sin^{7} (x) \cos^{3} (x) + 192 \sin^{5} (x) \cos^{3} (x) - 72 \sin^{3} (x) \cos^{3} (x) - 36 \sin (x) \cos^{3} (x) + 64 \sin^{7} (x) \cos (x) - 96 \sin^{5} (x) \cos (x) + 36 \sin^{3} (x) \cos (x)$