In Exercises 5-22

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

Problem

In Exercises 5-22, prove the identity. 19. tan⁡(u+3π4)=tan⁡u−11+tan⁡u\tan \left(u+\frac{3 \pi}{4}\right)=\frac{\tan u-1}{1+\tan u}

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