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Trigonometric integral

  1. Oct 24, 2013 #1
    Working on some fluid mechanics research for flat plate boundary layer, stuck on this integral:

    ∫sin(∏y/2δ)dy for 0<y<δ

    Any help would be deeply appreciated.
     
  2. jcsd
  3. Oct 24, 2013 #2
    What about -2δ/∏ cos(∏y/2δ) from 0<y<δ ?

    Which evaluates to: -2δ/∏( cos(∏/2) - 1) = 2δ/∏
     
  4. Oct 24, 2013 #3
    what method of integration is used to obtain that answer?
     
  5. Oct 24, 2013 #4

    Office_Shredder

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    Is the integral you are doing
    [tex] \int_{0}^{\delta} \sin\left( \frac{\pi y}{2 \delta} \right) dy [/tex]
    ?

    There is an obvious choice of substitution to do
     
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