Mathematics

Problem

Let

\theta = \tan^{-1}\left(\tan \frac{5\pi}{4}\right)

and

\phi = \tan^{-1}\left(-\tan \frac{2\pi}{3}\right)

then a.

\theta > \phi

4\theta - 3\phi = 0

\theta + \phi = \frac{7\pi}{12}

d. None of these