Involving sec-1(1/1+c z21/2)
Involving sec-1(1/1-z21/2) and cosh-1(z)
Involving sec-1(1/z2+11/2) and cosh-1(1+2 z2)
Involving sec-1(1/z2+11/2) and cosh-1((z2+1)1/2)
