Trigonometry Examples

$1 - {(- \frac{5}{13})}^{2}$

Step 1

Simplify each term.

Tap for more steps...

Step 1.1

Use the power rule ${(a b)}^{n} = a^{n} b^{n}$ to distribute the exponent.

Tap for more steps...

Step 1.1.1

Apply the product rule to $- \frac{5}{13}$ .

$1 - ({(- 1)}^{2} {(\frac{5}{13})}^{2})$

Step 1.1.2

Apply the product rule to $\frac{5}{13}$ .

$1 - ({(- 1)}^{2} \frac{5^{2}}{13^{2}})$

Step 1.2

Multiply $- 1$ by ${(- 1)}^{2}$ by adding the exponents.

Tap for more steps...

Step 1.2.1

Move ${(- 1)}^{2}$ .

$1 + {(- 1)}^{2} \cdot - 1 \frac{5^{2}}{13^{2}}$

Step 1.2.2

Multiply ${(- 1)}^{2}$ by $- 1$ .

Tap for more steps...

Step 1.2.2.1

Raise $- 1$ to the power of $1$ .

$1 + {(- 1)}^{2} \cdot {(- 1)}^{1} \frac{5^{2}}{13^{2}}$

Step 1.2.2.2

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

$1 + {(- 1)}^{2 + 1} \frac{5^{2}}{13^{2}}$

Step 1.2.3

Add $2$ and $1$ .

$1 + {(- 1)}^{3} \frac{5^{2}}{13^{2}}$

Step 1.3

Raise $- 1$ to the power of $3$ .

$1 - \frac{5^{2}}{13^{2}}$

Step 1.4

Raise $5$ to the power of $2$ .

$1 - \frac{25}{13^{2}}$

Step 1.5

Raise $13$ to the power of $2$ .

$1 - \frac{25}{169}$

Step 2

Simplify the expression.

Tap for more steps...

Step 2.1

Write $1$ as a fraction with a common denominator.

$\frac{169}{169} - \frac{25}{169}$

Step 2.2

Combine the numerators over the common denominator.

$\frac{169 - 25}{169}$

Step 2.3

Subtract $25$ from $169$ .

$\frac{144}{169}$

Step 3

The result can be shown in multiple forms.

Exact Form:

$\frac{144}{169}$

Decimal Form:

$0.85207100 \dots$