Q. 55.0( 2 Votes )
Choose the correc A. –1/4
B. –1/2
C. 1/4
D. 1/2
Answer :
∵ sin2x = 2 sin x cos x
⇒ sin x = 2 sin x/2 cos x/2
∵ sin2x/2 + cos2x/2 = 1
Dividing by cos x/2 we get
Taking – common
∵ 0 ≤ x ≤ π/2
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