## nubeer 3 years ago find the area of the surface generated by revolving r^2=cos2x about y axis. this question is related to polar coordinates.

1. TuringTest

$r^2=\cos(2x)$? strange to have r in terms of x like that. If it is in polar coordinates it should be $r^2=\cos(2\theta)$though I'm not sure how to revolve that about the y-axis... Please be sure the questions is posted properly.

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