The exact value of $\cos^{-1}(-1)+\cos^{-1}(1)$=

E

Editor

Sep 18, 2022

The exact value of $\cos^{-1}(-1)+\cos^{-1}(1)$=

Difficulty: Easy

A:

\pi

B:

-\pi

C:

\frac{\pi}{2}

D:

\frac{\pi}{3}

ID: 63273db9ca83163ac3a115b3