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int(pi//4)^(pi//2)((1-3cosx))/(sin^(2)x)...

`int_(pi//4)^(pi//2)((1-3cosx))/(sin^(2)x)dx`

Text Solution

Verified by Experts

`I=int((1)/(sin^(2)x)-(3cosx)/(sin^(2)x))dx=int(cosec^(2)x-3cosecxcotx)dx`.
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