Involving sin^-1((((1+z²)^1/2-1)/(2(1+z²)^1/2))^1/2)

Involving sin^-1((((1+z²)^1/2-1)/(2(1+z²)^1/2))^1/2) and tan^-1(z)

Involving sin^-1((((z²+1)^1/2-1)/(2(z²+1)^1/2))^1/2) and tan^-1(1/z)