My question here is do I have the correct limits of integration? At first I thought it would be from pi/10 to 3pi/10 but I have a feeling that those are incorrect.(adsbygoogle = window.adsbygoogle || []).push({});

1. The problem statement, all variables and given/known data

Find the area of one petal of the polar function r(x) = cos(5x)

2. Relevant equations

integral[alpa to beta] .5* r(x)^2dx

3. The attempt at a solution

cos(5x) = 0 when x = (1/5)*pi/2 = pi/10

This means that the limits of integration are pi/10 and -pi/10

integral (.5*cos(5x))dx = 1/4x - (sin(5x)/20) from pi/10 to -pi/10

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# Homework Help: Area of a Polar Function

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