# Multivariable Calculus : Double Integral - Polar Coordinates

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Find the indicated area by double integration in polar coordinates: The area inside both the circles r = 1 and r = 2 sin u

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##### Solution Summary

A double integral is solved. The polar coordinates are analyzed for circles.

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I use theta instead of u. We know that the jacobian here is r.

r changes between 1 and 2sin(theta). To find ...

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