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Calculating area of an ellipse

  1. Jan 24, 2012 #1
    Where did I go wrong? I showed all my work in the paint document...

    My thought is that I am using the incorrect approx rec and I am guessing that it extends into both the first and second quad, and not just the first quad, as I indicated in my picture.
     

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  2. jcsd
  3. Jan 24, 2012 #2
    I added another picture... I hope it is more legible.
     

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  4. Jan 24, 2012 #3

    SammyS

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    It appears to be simply a matter of a misplaced parenthesis.
     
  5. Jan 24, 2012 #4
    I looked at it again and It looks correct to me, the parenthesis that is.
     
  6. Jan 24, 2012 #5

    Dick

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    The second term in your indefinite integral should be (1/2)*a^2*arcsin(2/a).
     
  7. Jan 24, 2012 #6
    Thank you.... Actually I did leave out a parenthesis... the factor of 1/2 of the first term inside the parenthesis is actually suppose to be a factor of both terms in side the parenthesis.
     
  8. Jan 24, 2012 #7

    SammyS

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    Yes, I should have been more specific about where the missing parenthesis was to be located.
     
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