Posted by Wally on August 03, 2002 at 17:21:53:
If I intergate x cos x dx it = xsinx + cosx + c
I think you use the product rule to work this problem but i come up with an answer of xsinx + cos x x^2/2
What is the correct way to work this problem. I'm not sure why you don't have g(x).f' on the second part of the product rule. Thanks for you help.
From Thomas/Finely 9th edition p 277 ex 3 and p281 prob 65