# How do you find the exact values of arccos(sqrt3/2)?

##### 1 Answer
Jan 3, 2017

$\frac{\pi}{6} , \frac{5 \pi}{6}$

#### Explanation:

Trig Table of special arcs gives -->
$\cos x = \frac{\sqrt{3}}{2}$ --> arc $x = \frac{\pi}{6}$
Unit circle gives another arc that has the same cos value:
arc $x = \frac{5 \pi}{6}$
Answers for $\left(0 , 2 \pi\right)$:
$\frac{\pi}{6} , \frac{5 \pi}{6}$