Identify the trigonometric identity that is always true for every acute angle .

MATHEMATICS · Single correct · CBSE · Mathematics · Introduction to Trigonometry · Introduction to Trigonometry

Problem

Identify the trigonometric identity that is always true for every acute angle AA. (a) sin⁡A+cos⁡A=1\sin A + \cos A = 1 (b) sin⁡2A+cos⁡2A=1\sin^2 A + \cos^2 A = 1 (c) sin⁡2A−cos⁡2A=1\sin^2 A - \cos^2 A = 1 (d) sin⁡2A+cos⁡2A=cos⁡2A\sin^2 A + \cos^2 A = \cos 2A

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