Question

The principal value of sin^-1(sin(2π/3)) is

(a) - 2π/3

(b) 2π/3

(c) π/3

(d) 5π/3

Answer 1

Correct option (c) π/3

Explanation:

Given, sin^-1(sin(2π/3))

= sin^-1(sin(π - π/3))

= sin^-1(sin(π/3))

= (π/3)