Q. $\cos^{- 1}{\frac{1}{2} + 2\sin^{- 1}\frac{1}{2}}$ is equal to
A) $\frac{\pi}{4}$
B) $\frac{\pi}{6}$
C) $\frac{\pi}{3}$
D) $\frac{2\pi}{3}$
Explanation
(d)
$\cos^{- 1}{\frac{1}{2} + 2\sin^{- 1}{\frac{1}{2} = \frac{\pi}{3} + 2.\frac{\pi}{6} = \frac{2\pi}{3}}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.