Question

Evaluate the integral.

Answer 1

use by parts

Answer 2

huh?

Answer 3

what?

Answer 4

If experimentX suggests you take integral by part, that mean you use that method to solve your problem, try once. If you don't know what the method is, google, try first and then making question if you have any.

Answer 5

BY PARTS
\[\int\limits udv=uv-v \int\limits du\]
\[u=x ~~~~~ dv=cosxdx \\ \\ du=dx ~~~~~ v=sinx\]
\[\int\limits\limits xcosxdx=xcosx-\int\limits sinx dx\]
solve

Answer 6

\[\int\limits\limits\limits xcosxdx=xsinx-\int\limits\limits sinx dx \Huge *\]

Answer 7

yes

Answer 8

delete the first one, please, to not be confused

Answer 9

@onegirl , the second one is right, I asked him to delete the first one, but he 's gone.

Answer 10

ok thx