Involving sin^{-1}(z/(z^{2}+1)^{1/2})

Involving sin^{-1}(z/(z^{2}+1)^{1/2}) and tan^{-1}(z)

Involving sin^{-1}(z/(z^{2}+1)^{1/2}) and tan^{-1}(1/z)