Prove that .

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

Problem

Prove that cos⁡10∘+sin⁡10∘cos⁡10∘−sin⁡10∘=tan⁡55∘\frac{\cos 10^\circ + \sin 10^\circ}{\cos 10^\circ - \sin 10^\circ} = \tan 55^\circ.

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