Question

The equation 2cos^-1x = sin^-1(2x√(1 - x²))  is valid for all values of x satisfying

(A) -1 ≤ x ≤ 1

(B) 0 ≤ x ≤ 1

(C) 0  ≤ x ≤ 1/√2

(D) 1/√2 ≤ x ≤ 1 

Answer 1

Correct option (D) 1/√2 ≤ x ≤ 1

Explanation:

Now, left hand and right hand will be equal for