sin(wt)cos(nwt) dt
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Originally Posted by richard7893 sin(wt)cos(nwt) dt Make this integral into the form of udu and it integrates easily.
But if you do this your du=-nwsin(nwt). By doing this you cant substitute for sin(wt) because du=-nwsin(nwt)
Originally Posted by richard7893 But if you do this your du=-nwsin(nwt). By doing this you cant substitute for sin(wt) because du=-nwsin(nwt) Ooops! Sorry I missed that. Eyes are wearing out from looking at the computer. Hmmm, my first thought is to try the product to sum conversation for sin(a)cos(b), which looks like: That should split up into things you can integrate separately easily.
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