In Exercises 11-51

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

Problem

In Exercises 11-51, prove the identity. 46. cos⁡x1+sin⁡x+cos⁡x1−sin⁡x=2sec⁡x\frac{\cos x}{1+\sin x}+\frac{\cos x}{1-\sin x}=2 \sec x

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