A) \[\frac{\pi }{2}\]
B) \[\frac{5\pi }{3}\]
C) \[\frac{10\pi }{3}\]
D) \[0\]
Correct Answer: A
Solution :
\[{{\cos }^{-1}}\left[ \cos \frac{5\pi }{3} \right]+{{\sin }^{-1}}\left[ \frac{\cos 5\pi }{3} \right]=\frac{\pi }{2}\](Q \[{{\sin }^{-1}}x+{{\cos }^{-1}}x=\frac{\pi }{2}\]).
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