Mathematics

Problem

The value of

\cos^{-1}\left(\cos\frac{5\pi}{3}\right) + \sin^{-1}\left(\sin\frac{5\pi}{3}\right)

is (a) 0 (b)

\frac{\pi}{2}

(c)

\frac{2\pi}{3}

(d)

\frac{10\pi}{3}