Trigonometry Examples

$\sqrt{\frac{- 9}{16}}$

Step 1

Move the negative in front of the fraction.

$\sqrt{- \frac{9}{16}}$

Step 2

Rewrite $- \frac{9}{16}$ as ${(\frac{3 i}{4})}^{2}$ .

$\sqrt{{(\frac{3 i}{4})}^{2}}$

Step 3

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

$\frac{3 i}{4}$