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Prove that tan−1(√1+cos x+√1−cos x√1+cos x−√1−cos x)=π4−x2,where π<x<3π2 |
| Answer» Prove that tan−1(√1+cos x+√1−cos x√1+cos x−√1−cos x)=π4−x2,where π<x<3π2 | |