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MIT 18.02 Multivariable Calculus, Fall 2007
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OpenStudy (anonymous):
at the end of lecture 17, when talking about rotating around a point on circumference, Professor Aroux set the inner upper limit to be 2acos(angle), but why not just 2a? Thanks
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OpenStudy (anonymous):
Because that limit is varying, as you can notice, when you take, for example, a/2 in the x axis, the distance between the origin and "r" is different than the distance when you take x=2a. |dw:1354775027342:dw|
OpenStudy (anonymous):
oh, thanks
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