Question 1138381
The inverse sine function is represented by {{{sin^"-1"(x)}}} ,
and is defined as the angle {{{theta}}} such that
{{{-pi/2<=theta<=pi/2}}} and {{{sin(theta)=x}}} .
The only angle between {{{-pi/2}}} and {{{pi/2}}}}
that has {{{sin(theta)=1}}} is {{{theta=pi/2}}} ,
and {{{cos(pi/2)=highlight(0)}}} .