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- Thread starter mrcleanhands
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Where? I don't see it.## Homework Statement

https://docs.google.com/file/d/0BztURiLWDqMyaVplX0tMYUdNNkE/edit?usp=sharing [Broken]

## Homework Equations

## The Attempt at a Solution

Solution is given.

Did you draw the graph or have one to look at?I don't understand how +-∏/4 is found as a range for θ

Also why is 0 <= r <= cos2θ

r is always r which is defined as cos2θ

That is r on the curve. If you want the area enclosed, r goes from r=0 to r on the curve, no?

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Thanks :)

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