I don't understand how to integrate this. I'm doing Fourier series. http://www.wolframalpha.com/input/?i=integrate+from+0+to+pi%2C+cosx+sinnx+dx&x=0&y=0

Question

I don't understand how to integrate this.  I'm doing Fourier series. http://www.wolframalpha.com/input/?i=integrate+from+0+to+pi%2C+cosx+sinnx+dx&x=0&y=0

anonymous · Answer

yeh they do it by parts I think

anonymous · Answer

Test

anonymous · Answer

Unable to post a tiff file today on OpenStudy.com using Firefox, Google Chrome or Safari under Mac OS X 10.6.8.

Paste "integrate Cos[x]*Sin[n*x]" into the input box at WolfframAlpha.com and then click on "show steps"

anonymous · Answer

interestingly enough, my link above is exactly from wolfram alpha

anonymous · Answer

Refer to the attached jpg file.  It's the tiff file converted to jpg in Ubuntu Linux.

anonymous · Answer

Thanks, I eventually figured it out.  I don't always remember all the trig identities.