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dimitrix
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Homework Statement
Let R be the region in the 1st quadrant in the region enclosed by [tex]x=2cos(\theta)[/tex] and [tex]y=sin(2\theta)[/tex] Suppose R is rotated around the x-axis.
Find the volume of the resulting solid.
Homework Equations
The formula for the solid of revolution is:
[tex]V= \pi\int y^2 dx = \pi\int y^2 f(x)' dx [/tex]
I've included a picture of the graph below.
http://dimitrix.org/graph.JPG
The Attempt at a Solution
I plugged in the numbers into the formula and factored out the constants, but am now stuck with this crazy integral, did I do something wrong? I'm doing an introductory integral course, should I be able to solve these kind of integrals you think?
[tex] V= -2\pi\int Sin^2(2\theta) Sin(\theta) d\theta [/tex]
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