Question: I am having difficulty with the following question: evaluate the double integral R y 2 /(x 2 +y 2 )dA, where R is the region

I am having difficulty with the following question:

evaluate the double integral R y2/(x2 +y2)dA, where R is the region that lies between the circles

x2 +y2 =4 and x2 +y2 =81, by changing to polar coordinates.

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