1.

`int(sqrt((cosx)/(x))-sqrt((x)/(cosx))sinx)dx` equalsA. `-sqrt(xcosx)+C`B. `sqrt(xsinx)+C`C. `2sqrt(xcos x)+C`D. `C-2sqrt(xcosx)`

Answer» Correct Answer - C
`I=int(cosx-x sin x)/(sqrt(xcosx))dx`
Put `xcosx=t^(2)`
`rArr" "(cosx-x sin x)dx=2t dt`
`rArr" "I=int(2tdt)/(t)=2t+C=2sqrt(x cos x)+C`


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