1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: 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


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    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
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted