Involving csc-1(1/(1+c z2)1/2)
Involving csc-1(1/(1-z2)1/2) and cosh-1(z)
Involving csc-1(1/(z2+1)1/2) and cosh-1(1+2 z2)
Involving csc-1(1/(z2+1)1/2) and cosh-1((z2+1)1/2)
