" 19.The principal value of "sin^(-1)(sin(5 pi)/(3))

The principal value of sin^(-1)(sin((5pi)/6)) is-

The principal value of "sin"^(-1)("sin""(5pi)/(3)) is

The principal value of sin^(-1)sin((3pi)/4) is

The principal value of sin^(-1)(sin((2 pi)/(3))) is (a)-(2 pi)/(3) (b) (2 pi)/(3) (c) (4 pi)/(3) (d) (5 pi)/(3) (e) none of these

Principal value of sin^(-1)[sin((5pi)/(6))] is