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

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

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

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