Prove that , assuming…

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

Problem

Prove that tan⁡2θ=2tan⁡θ1−tan⁡2θ\tan2\theta=\dfrac{2\tan\theta}{1-\tan^{2}\theta}, assuming 1−tan⁡2θ≠01-\tan^{2}\theta\neq0.

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