Mathematics - Inverse Trigonometric Function Question with Solution | TestHub

If ${\sin }^{-1}\left(\sin \frac{33\pi }{7}\right)+{\cos }^{-1}\left(\cos \frac{46\pi }{7}\right)+{\tan }^{-1}\left(-\tan \frac{13\pi }{8}\right)+{\cot }^{-1}\left(\cot \left(-\frac{19\pi }{8}\right)\right)=\frac{\mathrm{a}\pi }{\mathrm{b}}$ Where $a$ and $b$ are in their lowest form, then $(a+b)$ equal to