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Homework Help: Trigonometric Integral

  1. Feb 2, 2006 #1
    Haven't done integrals in such a long time and now I'm having some trouble with this question here. Any help would be appreciated. Thanks :smile:

    http://img331.imageshack.us/img331/4333/screen192cj.jpg [Broken]
    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. Feb 2, 2006 #2


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    Dearly Missed

    Using the double angle formula as you do here is of course legitimate, however, there is a simpler choice:
    Substitute [itex]u=\sin(t)[/itex] instead.
  4. Feb 2, 2006 #3
    This looks better I hope?

    http://img312.imageshack.us/img312/5109/screen202ul.jpg [Broken]
    Last edited by a moderator: May 2, 2017
  5. Feb 2, 2006 #4
    +C of course :). But yes, that's correct.
  6. Feb 2, 2006 #5
    ^^^Arggg I always forget the constant. Thanks o:)
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