Question
Asked Dec 4, 2019
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Find ʃR (x2 + y2) dA where R is the region 4 ≤ (x2 + y2)≤ 9. Hint: Use polar coordinates.

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Expert Answer

Step 1

The given integral is,

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where R is the region 4< (x+y)9

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Step 2

It is known that,

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x=rcose y rsine Then, 2x2 x2 4 2 4 r 2 9 2-9 r =3

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Step 3

Therefore, the region...

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2rs3 and 00<27

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Tagged in

Math

Calculus

Integration