Integrate 1+cosx/1-cosx
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I=intefration of (1+cosx)/(1-cosx)
=integration of cos^2x/sin^2x
=integration of tan^2x
=integration sec^2x - 1
=tanx - x
=integration of cos^2x/sin^2x
=integration of tan^2x
=integration sec^2x - 1
=tanx - x
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Answer:
- -2cot(x/2)-x+C is the right answer.
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