Mathematics

Mathematics

Problem

Prove that: tan⁡θ+sec⁡θ−1tan⁡θ−sec⁡θ+1=1+sin⁡θcos⁡θ\frac{\tan \theta + \sec \theta - 1}{\tan \theta - \sec \theta + 1} = \frac{1 + \sin \theta}{\cos \theta}

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