Answer
$ \frac{2}{\sqrt 3}$
Work Step by Step
To find out exact value of $ \csc 60^{\circ}$, considering special triangle- $ 30^{\circ} - 60^{\circ} - 90^{\circ}$
$\csc 60^{\circ}$ = $\frac{hypotenuse}{side - opposite - 60^{\circ}}$
$\csc 60^{\circ}$ = $ \frac{2}{\sqrt 3}$
= $ \frac{2}{\sqrt 3}$
