InterviewSolution
Saved Bookmarks
| 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` |
|