## Trigonometry (11th Edition) Clone

$\frac{i}{3}$
Step 1: $\frac{\sqrt (-8)}{\sqrt (72)}$ Step 2: $\frac{\sqrt (-1\times8)}{\sqrt (8\times9)}$ Step 3: $\frac{\sqrt (-1)\times\sqrt 8}{\sqrt 8\times\sqrt 9}$ Step 4: Removing $\sqrt 8$ as it is common to both numerator and denominator, $\frac{\sqrt (-1)}{\sqrt 9}$ Step 5: $\frac{\sqrt (-1)}{\sqrt 9}=\frac{i}{3}$