What is the definition of the Inverse Sine Function?

The Inverse Sine Function is denoted by ##arc sin ## or ##sin^-1## and
is defined by
##arc sin x=theta x in [-11] iff sin theta=x theta in [-pi/2pi/2]##
The Inverse Sine Function is denoted by ##arc sin ## or ##sin^-1## and
is defined by
##arc sin x=theta x in [-11] iff sin theta=x theta in [-pi/2pi/2]##