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shards5
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Homework Statement
Using polar coordinates, evaluate the integral which gives the area which lies in the first quadrant between the circles x2 + y2 = 256 and x2 - 16x + y2 = 0.
Homework Equations
The Attempt at a Solution
Finding the intervals of integration for the polar coordinates.
From the first equation I get r2 = 256 therefore r = 16
From the second equation I get r2 - 16rcos[tex]\theta[/tex] therefore r = 16cos([tex]\theta[/tex])
Since it is the first quadrant theta will be from 0 to pi/2.
Now this is the part where I am confused about. My intuition is that I should integrate the bigger circle and then subtract the integral of the smaller circle within it so I would have something like the following.
[tex]\int^{\pi/2}_{0}\int^{16}_{0} r drd\theta - \int^{\pi/2}_{0}\int^{16cos\theta}_{8} r drd\theta[/tex].
Is this the right approach?