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Homework Statement
Question attached in attachments
Homework Equations
Area enclosed by polar graph is ∫0.5r^2
where r is the radius as a function of angle theta
The Attempt at a Solution
I attempted to use the formula above and I subtracted the area of the inside from the outside but it seems to yield an incorrect solution.
##0.5∫((2cos(3x))^2)dx0.5∫4dx##
The limit of integration are from ##0## to ##2π##
The answer is D
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