# How do you find the exact value of arctan of -1/sqrt[3]?

Find $\arctan \left(- \frac{1}{\sqrt{3}}\right)$
Ans:$\frac{5 \pi}{6}$
$\tan x = - \frac{1}{\sqrt{3}} = - \frac{\sqrt{3}}{3}$ --> arc $x = \frac{5 \pi}{6}$