The principal value of sin^-1 (-√3/2) is (a) -2π/3 (b) 4π/3 (c) 5π/3 (d) -π/3

Question

The principal value of 

sin^-1 \(\left(-\cfrac{\sqrt{3}}{2}\right)\) 

sin^-1 (-√3/2) is

(a) -2π/3

(b) 4π/3

(c) 5π/3

(d) -π/3

Answer 1

Correct option is: (d) -π/3