1.

int((1+x^(2))(2+x^2))/((xco sx+sinx)^(4))dx equals

Answer»

`tan(x+cot^(-1)x)+(tan^(3)(x+cot^(-1)x))/(3)+C`
`tan(x-cot^(-1)x)+(tan^(3)(x-cot^(-1)x))/(3)+c`
`-(1)/(3)((1-xtanx)/(x+tanx))^(3)-((1-xtanx)/(x+tanx))+c`
`-(1)/(2)((1+xtanx)/(x-tanx))^(3)-((1+xtanx)/(x-tanx))+c`

Answer :B::C


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