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Q: Integration of e^(-t/2)cos(n2t)dt

  1. Nov 14, 2007 #1
    Hello everyone,

    I haven't done calculus in a long time now and i've been reviewing some old calc books but couldnt' find anything that helps. Was wondering how to integrate this function:


    I was thinking of using the u substitution technique but can't find a substitute for u. Any help would be fantastic.

  2. jcsd
  3. Nov 14, 2007 #2
    Limits are from 0 to pi

    Limits are from 0 to pi
  4. Nov 14, 2007 #3
    well from what i can see here, i havent tried it myself though, so i might be wrong, but it is worth a try. integration by parts i think would work here. let u=e^-(t/2), and v=integ of cos(n2t)dt, and applying integration by parts twice i think you might get something.
    sorry for not having time to do it myself first.
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