Question

If sin^–1x = 2sin^–1 a has a solution for

(a) \(|a| \ge \frac1{\sqrt 2}\)

(b) \(|a| \le \frac1{\sqrt 2}\)

(c) all real values of a

(d) \(|a| < \frac1{ 2}\)

Answer 1

Correct option is (b) \(|a| \le \frac1{\sqrt 2}\)