Trigonometry Examples

$\sqrt{13^{2} - 5^{2}}$

Step 1

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

$\sqrt{169 - 5^{2}}$

Step 2

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

$\sqrt{169 - 1 \cdot 25}$

Step 3

Multiply $- 1$ by $25$ .

$\sqrt{169 - 25}$

Step 4

Subtract $25$ from $169$ .

$\sqrt{144}$

Step 5

Rewrite $144$ as $12^{2}$ .

$\sqrt{12^{2}}$

Step 6

Pull terms out from under the radical, assuming positive real numbers.

$12$