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Line integral of semicircle

  1. Nov 11, 2009 #1
    so I have a semi circle that goes from

    [tex] \frac{5\pi}{4} to \frac{\pi}{4} [/tex]

    so the angle between the x axis the radius of the circle is 45 degrees.

    I have, letting the radius = a)

    [tex] \frac{1}{a} \int \.dl [/tex]

    this is going to have an x and y component, I know the x component is 2a in the direction of x, but what about the y component?
     
    Last edited: Nov 11, 2009
  2. jcsd
  3. Nov 12, 2009 #2
    What function are you integrating over that semi-circle?
     
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