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Find an equation in Cartesian coordinates for the equation given in cylindrical coordinates: (a) r = 2 cos 0, (b) r2 +z2 = 5.

Find an equation in Cartesian coordinates for the equation given in cylindrical coordinates: (a) r = 2 cos 0, (b) r2 +z2 = 5. Sketch each surface in Cartesian coordinates.

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