Trigonometry Examples

$\sqrt{9^{2} + 12^{2}}$

Step 1

Raise $9$ to the power of $2$ .

$\sqrt{81 + 12^{2}}$

Step 2

Raise $12$ to the power of $2$ .

$\sqrt{81 + 144}$

Step 3

Add $81$ and $144$ .

$\sqrt{225}$

Step 4

Rewrite $225$ as $15^{2}$ .

$\sqrt{15^{2}}$

Step 5

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

$15$