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Help with trigonometric integration problem

  1. Aug 4, 2012 #1
    The problem is to find [itex]\int[/itex](cos5x)/([itex]\sqrt{sinx}[/itex])

    I rewrote cos5x as cosx(1-sin2x)2, finally getting:

    (cosx-2cosxsin2x+cosxsin4x)/[itex]\sqrt{sinx}[/itex]

    and I don't even know if this is the correct path, so, any advice would be appreciated.
     
  2. jcsd
  3. Aug 4, 2012 #2

    rock.freak667

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    Homework Helper

    Re-write your integral replacing cos5x with what you have in your second line.

    Now if you put t=sinx, what is dt?
     
  4. Aug 4, 2012 #3
    Thanks! I have the answer!
     
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