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Convert the following equation into cylindrical coordinates...

x^2 + y^2 + z^2 = 4

It's obvious that r^2 = x^2+y^2... but that would only simplify the equation to:

r^2 + z^2 = 4 ... is there a better way to do this?

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# Homework Help: Question about cylindrical (ie. 3d polar) coordinate system.

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