Mathematics

Mathematics

Problem

For xx such that cos⁡x≠0\cos x\ne 0, the identity 1+tan⁡2x=sec⁡2x1+\tan^{2}x=\sec^{2}x is obtained by a) dividing sin⁡2x+cos⁡2x=1\sin^{2}x+\cos^{2}x = 1 by sin⁡2x\sin^{2}x b) multiplying sin⁡2x+cos⁡2x=1\sin^{2}x+\cos^{2}x = 1 by cos⁡2x\cos^{2}x c) dividing sin⁡2x+cos⁡2x=1\sin^{2}x+\cos^{2}x = 1 by cos⁡2x\cos^{2}x d) dividing sin⁡2x+cos⁡2x=1\sin^{2}x+\cos^{2}x = 1 by sin⁡xcos⁡x\sin x\cos x

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