Which of the following expressions is identically equal to ?

MATHEMATICS · Single correct · CBSE · Mathematics · Trigonometric Functions · Trigonometric Functions

Problem

Which of the following expressions is identically equal to sin⁡2θ\sin 2\theta? (a) cos⁡2θ\cos 2\theta (b) sin⁡θcos⁡θ\sin\theta\cos\theta (c) 2sin⁡θcos⁡θ2\sin\theta\cos\theta (d) sin⁡2θ+cos⁡2θ\sin^{2}\theta+\cos^{2}\theta

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