Which of the following gives the correct expansion of ?

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

Problem

Which of the following gives the correct expansion of sin⁡(x+y)\sin (x+y)? (a) sin⁡xsin⁡y+cos⁡xcos⁡y\sin x\sin y+\cos x\cos y (b) sin⁡xcos⁡y+cos⁡xsin⁡y\sin x\cos y+\cos x\sin y (c) sin⁡xcos⁡y−cos⁡xsin⁡y\sin x\cos y-\cos x\sin y (d) cos⁡xcos⁡y−sin⁡xsin⁡y\cos x\cos y-\sin x\sin y

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