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## Homework Statement

convert double integral from line one to polar integral and then evaluate

see problem 12 attachment

## Homework Equations

y=rsinx

x=rcosx

r^2=x^2+y^2

## The Attempt at a Solution

see problem 12 attachment

I calculate a area of zero. are my limits wrong and if so which ones, or did i make a mistake in the aritmatic, or something else?