Trigonometry Examples

{(1 + i)}^{6}

${(1 + i)}^{6}$

Step 1

Use the Binomial Theorem.

1^{6} + 6 \cdot 1^{5} i + 15 \cdot 1^{4} i^{2} + 20 \cdot 1^{3} i^{3} + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}

$1^{6} + 6 \cdot 1^{5} i + 15 \cdot 1^{4} i^{2} + 20 \cdot 1^{3} i^{3} + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}$

Step 2

Simplify terms.

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Step 2.1

Simplify each term.

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Step 2.1.1

One to any power is one.

1 + 6 \cdot 1^{5} i + 15 \cdot 1^{4} i^{2} + 20 \cdot 1^{3} i^{3} + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}

$1 + 6 \cdot 1^{5} i + 15 \cdot 1^{4} i^{2} + 20 \cdot 1^{3} i^{3} + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}$

Step 2.1.2

One to any power is one.

1 + 6 \cdot 1 i + 15 \cdot 1^{4} i^{2} + 20 \cdot 1^{3} i^{3} + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}

$1 + 6 \cdot 1 i + 15 \cdot 1^{4} i^{2} + 20 \cdot 1^{3} i^{3} + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}$

Step 2.1.3

Multiply

6

$6$ by

1

$1$ .

1 + 6 i + 15 \cdot 1^{4} i^{2} + 20 \cdot 1^{3} i^{3} + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}

$1 + 6 i + 15 \cdot 1^{4} i^{2} + 20 \cdot 1^{3} i^{3} + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}$

Step 2.1.4

One to any power is one.

1 + 6 i + 15 \cdot 1 i^{2} + 20 \cdot 1^{3} i^{3} + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}

$1 + 6 i + 15 \cdot 1 i^{2} + 20 \cdot 1^{3} i^{3} + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}$

Step 2.1.5

Multiply

15

$15$ by

1

$1$ .

1 + 6 i + 15 i^{2} + 20 \cdot 1^{3} i^{3} + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}

$1 + 6 i + 15 i^{2} + 20 \cdot 1^{3} i^{3} + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}$

Step 2.1.6

Rewrite

i^{2}

$i^{2}$ as

- 1

$- 1$ .

1 + 6 i + 15 \cdot - 1 + 20 \cdot 1^{3} i^{3} + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}

$1 + 6 i + 15 \cdot - 1 + 20 \cdot 1^{3} i^{3} + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}$

Step 2.1.7

Multiply

15

$15$ by

- 1

$- 1$ .

1 + 6 i - 15 + 20 \cdot 1^{3} i^{3} + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}

$1 + 6 i - 15 + 20 \cdot 1^{3} i^{3} + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}$

Step 2.1.8

One to any power is one.

1 + 6 i - 15 + 20 \cdot 1 i^{3} + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}

$1 + 6 i - 15 + 20 \cdot 1 i^{3} + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}$

Step 2.1.9

Multiply

20

$20$ by

1

$1$ .

1 + 6 i - 15 + 20 i^{3} + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}

$1 + 6 i - 15 + 20 i^{3} + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}$

Step 2.1.10

Factor out

i^{2}

$i^{2}$ .

1 + 6 i - 15 + 20 (i^{2} \cdot i) + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}

$1 + 6 i - 15 + 20 (i^{2} \cdot i) + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}$

Step 2.1.11

Rewrite

i^{2}

$i^{2}$ as

- 1

$- 1$ .

1 + 6 i - 15 + 20 (- 1 \cdot i) + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}

$1 + 6 i - 15 + 20 (- 1 \cdot i) + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}$

Step 2.1.12

Rewrite

- 1 i

$- 1 i$ as

- i

$- i$ .

1 + 6 i - 15 + 20 (- i) + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}

$1 + 6 i - 15 + 20 (- i) + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}$

Step 2.1.13

Multiply

- 1

$- 1$ by

20

$20$ .

1 + 6 i - 15 - 20 i + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}

$1 + 6 i - 15 - 20 i + 15 \cdot 1^{2} i^{4} + 6 \cdot 1 i^{5} + i^{6}$

Step 2.1.14

One to any power is one.

1 + 6 i - 15 - 20 i + 15 \cdot 1 i^{4} + 6 \cdot 1 i^{5} + i^{6}

$1 + 6 i - 15 - 20 i + 15 \cdot 1 i^{4} + 6 \cdot 1 i^{5} + i^{6}$

Step 2.1.15

Multiply

15

$15$ by

1

$1$ .

1 + 6 i - 15 - 20 i + 15 i^{4} + 6 \cdot 1 i^{5} + i^{6}

$1 + 6 i - 15 - 20 i + 15 i^{4} + 6 \cdot 1 i^{5} + i^{6}$

Step 2.1.16

Rewrite

i^{4}

$i^{4}$ as

1

$1$ .

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Step 2.1.16.1

Rewrite

i^{4}

$i^{4}$ as

{(i^{2})}^{2}

${(i^{2})}^{2}$ .

1 + 6 i - 15 - 20 i + 15 {(i^{2})}^{2} + 6 \cdot 1 i^{5} + i^{6}

$1 + 6 i - 15 - 20 i + 15 {(i^{2})}^{2} + 6 \cdot 1 i^{5} + i^{6}$

Step 2.1.16.2

Rewrite

i^{2}

$i^{2}$ as

- 1

$- 1$ .

1 + 6 i - 15 - 20 i + 15 {(- 1)}^{2} + 6 \cdot 1 i^{5} + i^{6}

$1 + 6 i - 15 - 20 i + 15 {(- 1)}^{2} + 6 \cdot 1 i^{5} + i^{6}$

Step 2.1.16.3

Raise

- 1

$- 1$ to the power of

2

$2$ .

1 + 6 i - 15 - 20 i + 15 \cdot 1 + 6 \cdot 1 i^{5} + i^{6}

$1 + 6 i - 15 - 20 i + 15 \cdot 1 + 6 \cdot 1 i^{5} + i^{6}$

1 + 6 i - 15 - 20 i + 15 \cdot 1 + 6 \cdot 1 i^{5} + i^{6}

$1 + 6 i - 15 - 20 i + 15 \cdot 1 + 6 \cdot 1 i^{5} + i^{6}$

Step 2.1.17

Multiply

15

$15$ by

1

$1$ .

1 + 6 i - 15 - 20 i + 15 + 6 \cdot 1 i^{5} + i^{6}

$1 + 6 i - 15 - 20 i + 15 + 6 \cdot 1 i^{5} + i^{6}$

Step 2.1.18

Multiply

6

$6$ by

1

$1$ .

1 + 6 i - 15 - 20 i + 15 + 6 i^{5} + i^{6}

$1 + 6 i - 15 - 20 i + 15 + 6 i^{5} + i^{6}$

Step 2.1.19

Factor out

i^{4}

$i^{4}$ .

1 + 6 i - 15 - 20 i + 15 + 6 (i^{4} i) + i^{6}

$1 + 6 i - 15 - 20 i + 15 + 6 (i^{4} i) + i^{6}$

Step 2.1.20

Rewrite

i^{4}

$i^{4}$ as

1

$1$ .

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Step 2.1.20.1

Rewrite

i^{4}

$i^{4}$ as

{(i^{2})}^{2}

${(i^{2})}^{2}$ .

1 + 6 i - 15 - 20 i + 15 + 6 ({(i^{2})}^{2} i) + i^{6}

$1 + 6 i - 15 - 20 i + 15 + 6 ({(i^{2})}^{2} i) + i^{6}$

Step 2.1.20.2

Rewrite

i^{2}

$i^{2}$ as

- 1

$- 1$ .

1 + 6 i - 15 - 20 i + 15 + 6 ({(- 1)}^{2} i) + i^{6}

$1 + 6 i - 15 - 20 i + 15 + 6 ({(- 1)}^{2} i) + i^{6}$

Step 2.1.20.3

Raise

- 1

$- 1$ to the power of

2

$2$ .

1 + 6 i - 15 - 20 i + 15 + 6 (1 i) + i^{6}

$1 + 6 i - 15 - 20 i + 15 + 6 (1 i) + i^{6}$

1 + 6 i - 15 - 20 i + 15 + 6 (1 i) + i^{6}

$1 + 6 i - 15 - 20 i + 15 + 6 (1 i) + i^{6}$

Step 2.1.21

Multiply

i

$i$ by

1

$1$ .

1 + 6 i - 15 - 20 i + 15 + 6 i + i^{6}

$1 + 6 i - 15 - 20 i + 15 + 6 i + i^{6}$

Step 2.1.22

Factor out

i^{4}

$i^{4}$ .

1 + 6 i - 15 - 20 i + 15 + 6 i + i^{4} i^{2}

$1 + 6 i - 15 - 20 i + 15 + 6 i + i^{4} i^{2}$

Step 2.1.23

Rewrite

i^{4}

$i^{4}$ as

1

$1$ .

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Step 2.1.23.1

Rewrite

i^{4}

$i^{4}$ as

{(i^{2})}^{2}

${(i^{2})}^{2}$ .

1 + 6 i - 15 - 20 i + 15 + 6 i + {(i^{2})}^{2} i^{2}

$1 + 6 i - 15 - 20 i + 15 + 6 i + {(i^{2})}^{2} i^{2}$

Step 2.1.23.2

Rewrite

i^{2}

$i^{2}$ as

- 1

$- 1$ .

1 + 6 i - 15 - 20 i + 15 + 6 i + {(- 1)}^{2} i^{2}

$1 + 6 i - 15 - 20 i + 15 + 6 i + {(- 1)}^{2} i^{2}$

Step 2.1.23.3

Raise

- 1

$- 1$ to the power of

2

$2$ .

1 + 6 i - 15 - 20 i + 15 + 6 i + 1 i^{2}

$1 + 6 i - 15 - 20 i + 15 + 6 i + 1 i^{2}$

1 + 6 i - 15 - 20 i + 15 + 6 i + 1 i^{2}

$1 + 6 i - 15 - 20 i + 15 + 6 i + 1 i^{2}$

Step 2.1.24

Multiply

i^{2}

$i^{2}$ by

1

$1$ .

1 + 6 i - 15 - 20 i + 15 + 6 i + i^{2}

$1 + 6 i - 15 - 20 i + 15 + 6 i + i^{2}$

Step 2.1.25

Rewrite

i^{2}

$i^{2}$ as

- 1

$- 1$ .

1 + 6 i - 15 - 20 i + 15 + 6 i - 1

$1 + 6 i - 15 - 20 i + 15 + 6 i - 1$

1 + 6 i - 15 - 20 i + 15 + 6 i - 1

$1 + 6 i - 15 - 20 i + 15 + 6 i - 1$

Step 2.2

Simplify by adding terms.

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Step 2.2.1

Subtract

15

$15$ from

1

$1$ .

- 14 + 6 i - 20 i + 15 + 6 i - 1

$- 14 + 6 i - 20 i + 15 + 6 i - 1$

Step 2.2.2

Simplify by adding and subtracting.

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Step 2.2.2.1

Add

- 14

$- 14$ and

15

$15$ .

1 + 6 i - 20 i + 6 i - 1

$1 + 6 i - 20 i + 6 i - 1$

Step 2.2.2.2

Subtract

1

$1$ from

1

$1$ .

0 + 6 i - 20 i + 6 i

$0 + 6 i - 20 i + 6 i$

Step 2.2.2.3

Add

0

$0$ and

6 i

$6 i$ .

6 i - 20 i + 6 i

$6 i - 20 i + 6 i$

6 i - 20 i + 6 i

$6 i - 20 i + 6 i$

Step 2.2.3

Subtract

20 i

$20 i$ from

6 i

$6 i$ .

- 14 i + 6 i

$- 14 i + 6 i$

Step 2.2.4

Add

- 14 i

$- 14 i$ and

6 i

$6 i$ .

- 8 i

$- 8 i$

- 8 i

$- 8 i$

- 8 i

$- 8 i$