Please show me how you got the answer Thanks Evaluate the ex

Please show me how you got the answer. Thanks.

Evaluate the expression sin^-1(cos(pi/3)).

Solution

sin^-1(cos(pi/3))

=sin^-1(sin(pi/2 -pi/3))

=sin^-1(sin(pi/6))

=pi/6

or

sin^-1(cos(pi/3))

=sin^-1(1/2)

=pi/6