# Cartersian double integral converted to polar and then evaluated #2

## Homework Statement

convert line one to polar integral and then evaluate
see problems 16 attachement

r^2=y^2+x^2

## The Attempt at a Solution

I changed to polar and evaluated the double integral but I come up with an answer of negative pi which seems odd since it is an area value and should be posititve. What did i do wrong?
see problem 16 attachement

#### Attachments

• problem 16.jpg
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