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if I=int(x^(2)+20)/((x sin x+5cosx)^(2))...

`if I=int(x^(2)+20)/((x sin x+5cosx)^(2))dx`,then I equals-

A

`-x/(cos x(xsin+5cosx))+tan x +c`

B

`x/(sinx(xsin + 5cos x))+cotx+c`

C

`(x sin x - 5 cos x )^(-1) sin x + 7x + c`

D

`-x sec x(x sin x + 5cosx)^(-1) + cot(pi/2-x)+c`

Text Solution

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The correct Answer is:
A, D
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