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

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

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