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Math Help - URGENT please help:ellipse

  1. #1
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    Exclamation URGENT please help:ellipse

    Using Green's formula, evaluate the integral
    C(x+y)-dx(x-y) dy, where
    C is the ellipse

    x^2/a^2+b^2+a^2=1

    i no the area of an ellipse is piab but i must show this is the case in relation to the question im not sure how thsi is done!!!i no using greens formula for that integral that its -2 thus the final answer will be 2piab

    howvere i have started by using jacobian to obtain abdudvwith th ellipse being u^2+v^2=1 howvere im unsure of whatlimits to put into the above integral abdudv to get pi can anyone help please it would be much appreciated!!!! thanks
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  2. #2
    Member Nacho's Avatar
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    I dont speak english completly. But I understand that you want find the ellipse area?
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  3. #3
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    Krizalid's Avatar
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    Too advanced Nacho, it's vector calculus, you'll probably cover this next year.
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  4. #4
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    Quote Originally Posted by calculusgeek View Post
    Using Green's formula, evaluate the integral
    C(x+y)-dx(x-y) dy, where
    C is the ellipse

    x^2/a^2+b^2+a^2=1

    i no the area of an ellipse is piab but i must show this is the case in relation to the question im not sure how thsi is done!!!i no using greens formula for that integral that its -2 thus the final answer will be 2piab

    howvere i have started by using jacobian to obtain abdudvwith th ellipse being u^2+v^2=1 howvere im unsure of whatlimits to put into the above integral abdudv to get pi can anyone help please it would be much appreciated!!!! thanks
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