Hi Hina,
Please confirm whether your question is
sin^-1 (sin^2 x)=?
or
sin^-1 (sin 2x)=?
and remember, if you want to write sin-1(x) on a computer, write arcsin(x) instead, Never confuse it with [sin(x)]-1
Waiting for your question,
Regards
Rajat
Askiitian Expert