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**Find the region enclosed by one leaf of the function r=2 sin2θ**

Now i know how the diagram looks like for this function.

The diagram can be obtained by using :

x= r cosθ = 2 sin2θ cosθ

y= r sinθ = 2 sin2θ sinθ

Now i have to find the region enclosed by one of the leaves which i am not able to do.

I know i have to use the jacobian and also that i can use the above as cylindrical coordinates but what do i integrate? i dont know which function to integrate.

Any Suggestions for that??

thank you