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double integral in polar coordinates problem



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\[\int\limits_{}^{}\int\limits_{}^{} (x^2+y^2)\]

myko
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\[\int\limits\int\limits r^2 rdrd \theta\]

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R=\[0\le R \le, 0 \le \Theta \le 2\pi\]

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how did you get that?

myko
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x=rcos(theta)
y=rsin(theta)
the other r multiplying r^2 is the Jacobian of the coordinate transfomation matrix

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hate those polar coordinates

myko
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:), they are preaty usefull