Indefinite Integral question

deydas

Hi!

I am stuck with this integration problem:

Thanks in advance.

Tide

Are you sure that's the right integrand?

deydas

yes that's the sum alright.

arildno

Then you might as well resign.

deydas

i guess there some printing error and that's not the sum. sorry for disturbing you guys.

arildno

It should be possible if you have only cos(3x) in the denominator, and not xcos(3x)

deydas

actually after doing a back calculation, i believe it should be 2cos(3x). darn mistake, really gave me a headache.

anyways thanks for all your help.