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Multivariable Calculus

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Moderate

Circular Cylinder

MVCALC-RIEUBF

Let $S$ be a surface whose equation in cylindrical coordinates is $r=3\sin \theta$.

What kind of surface is $S$?

A

A plane.

B

A sphere.

C

A right circular cylinder.

D

A hyperboloid.

E

A hyperbolic paraboloid.