csc^-1(2)=?

$$csc^{-1}(2)\\\\ =sin^{-1}\left(\frac{1}{2}\right)\\\\ = 30^0 \quad or \quad \frac{\pi}{6}\;radians\\\\\\ cot^{-1}(-\sqrt3)\\\\ =tan^{-1}\left(\frac{-1}{\sqrt3}\right)\\\\ =tan^{-1}\left(\frac{-1}{\sqrt3}\right)\\\\ = -30^0 \quad or \quad \frac{-\pi}{6}\;radians\\\\\\$$

csc^-1(2)= 30 degrees or 0.523598775598.

cot^-1(-sqrt3)= -30 degrees or -0.523598775598.