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