The principal value of ${\cos ^{ - 1}}\left( { - \frac{1}{2}} \right)$ is ………..
The principal value of ${\cos ^{ - 1}}\left( { - \frac{1}{2}} \right)$ is ………..
Official Solution
VVidaara Team
✓ Verified solution
NCERT & Exemplar
$0 \le {\cos ^{ - 1}}x \le \pi$
${\cos ^{ - 1}}\left( { - \frac{1}{2}} \right) = {\cos ^{ - 1}}\left( {\cos \frac{{2\pi }}{3}} \right) = \frac{{2\pi }}{3}$
Community Answers (0)
Log in to post your own answer or join the discussion.
No comments yet — start the discussion.