Question

if 4 cos ^-1 X + sin ^-1 X = pi, then find x.

Answer 1

3 cos (inverse x) +cos(inversex)+sin(inverse x) =pi
3cos(inversex)+(pi/2)=(pi)
3cos(inverse x) =(pi) /2
Cos(inverse x=pi/6
x=cos(pi/6)=root3/2