If , prove that…

MATHEMATICS · Subjective · A Level · Mathematics · Trigonometry · Trigonometry

Problem

If tan⁡2θ=2tan⁡2ϕ+1\tan^2 \theta = 2 \tan^2 \phi + 1 , prove that cos⁡2θ+sin⁡2ϕ=0\cos 2\theta + \sin^2 \phi = 0 .

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