Question

evaluate the integral.

Answer 1

\[\int\limits_{0}^{\infty} e ^{-x} \cos5x\]

Answer 2

I integrated it and go -1/26 e^(-x) (cos 5x-5 sin 5x)+c

Answer 3

is that correct?

Answer 4

how come you have a C on your answer if you integral have limits?

The answer is 1/26 btw

Answer 5

hmm.. i didn't integrate it but to get the answer you take the limit as x approaches infinity....

Answer 6

ok so is the answer 1/26

Answer 7

so i integrated correctly

Answer 8

Yes madame. But you cant put a C on your answer cause this integral has limits

Answer 9

Yea thats true. Haha Its just habit because I was getting points off for not putting +c hah