ANSWER CHECK: Double Integral in Polar

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Pull and Twist
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Here is the problem I am dealing with...
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And this is how I approached it. Can anyone confirm that I did it correctly and got the right answer?

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Thank you.
 

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PullandTwist said:
Can anyone confirm that I did it correctly and got the right answer?
Yes, it's all good. (Yes)
 
Thank you for verifying it for me. 🙂