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Integrate csc^4x/cot^2x

User Vinoth A
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Hello,


1) \int\limits (1)/(sin^2(x)) \, dx =-\ cotg x\\\\ 2)cosec^4(x)/cotg^2(x)= (1)/(sin^4(x)) * (sin^2(x))/(cos^2(x))= (4)/(sin^2(2x)) \\\\\\ \int\limits{cosec^4(x)/cotg^2(x)} \, dx \\\\ = \int\limits{ (4)/(sin^2(2x))} \.dx\\\\ =-\ 2\ cotg(2x) + C
User Mansoor Akhtar
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