(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I need to find the circulation of F through L.

I tried to use Gauss' law to find it, so I first found the divergence and so on.

Anyway, somewhere in the solution I switch to polar coordinate system but I didn't changed z, what means I took the boundaries of z from r to 2-r^2 as you can see in the attach.

My question is, can I do that or do I need to change to spherical coordinate system? and if so, what are the boundaries of tetha?

2. Relevant equations

3. The attempt at a solution

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# Homework Help: What are the boundaries of tetha?

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