Trigonometry Examples

$\sqrt{5^{2} - 4^{2}}$

Step 1

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

$\sqrt{25 - 4^{2}}$

Step 2

Raise $4$ to the power of $2$ .

$\sqrt{25 - 1 \cdot 16}$

Step 3

Multiply $- 1$ by $16$ .

$\sqrt{25 - 16}$

Step 4

Subtract $16$ from $25$ .

$\sqrt{9}$

Step 5

Rewrite $9$ as $3^{2}$ .

$\sqrt{3^{2}}$

Step 6

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

$3$