Trigonometry Examples

$- \sqrt{- 165}$

Step 1

Rewrite $- 165$ as $- 1 (165)$ .

$- \sqrt{- 1 (165)}$

Step 2

Rewrite $\sqrt{- 1 (165)}$ as $\sqrt{- 1} \cdot \sqrt{165}$ .

$- (\sqrt{- 1} \cdot \sqrt{165})$

Step 3

Rewrite $\sqrt{- 1}$ as $i$ .

$- i \sqrt{165}$