Involving sinh-1((1-(1-z2)1/2)1/2/(21/2 (1-z2)1/4))
Involving sinh-1((1-(1-z2)1/2)1/2/(21/2 (1-z2)1/4)) and tanh-1(z)
Involving sinh-1((1-(1-z2)1/2)1/2/(21/2 (1-z2)1/4)) and tanh-1(1/z)