sin^-1(51pi/29) =

Question

The angle 51π/29 radians is in quadrant    I II III IV , so sin^−1(sin(51π/29))= 

 radians,=

Answer 1

sin^-1(sin51π/29) = sin^-1(sin(51π/29 - 2π)) = sin^-1(sin(- 7π/29)) = - 7π/29,

because - π/2 < - 7π/29 < π/2