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intsqrt((cosx-cos^3x)/(1-cos^3x))dx is e...

`intsqrt((cosx-cos^3x)/(1-cos^3x))dx `is equal to (a) `-2/3sin^(-1)(cos^(3/2)x)+C` (b) `3/2sin^(-1)(cos^(3/2)x)+C` (c) `2/3cos^(-1)(cos^(3/2)x)+C` (d) none of these

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