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ID: 2845939 • Letter: #

Question

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Explanation / Answer

The circular arc has equation r = 2 in polar coordinates (with ? in [0, ?/2]).
The line x = 5 has polar coordinates representation r cos ? = 5 ==> r = 5/cos ?.

So, the region is given by
2 ? r ? 5/cos ? with 0 ? ? ? ?/2.