Prove that \(\tan^{-1}\left(\frac{4}{3}\right)-\tan^{-1}\left(\frac{1}{7}\right)=\frac{\pi}{4}\)

Convert the following degree measure into radian measure 150^o

Convert the following degree measure into radian measure -320^o

Find the degree measure corresponding to the following radian measure. \(\frac { 9\pi }{ 5 } \)

Find the degree measure corresponding to the following radian measure.  \(\frac { 11\pi }{ 18 } \)