Identify the geometric object that is represented by parametric equations $\mathbf { r } ( t , s ) = \langle s \cos t , s \sin t , t \rangle$ .
A)A plane
B)A cone
C)A straight line
D)A circular cylinder
E)A circle
F)A circular disk
G)A helix
H)A sphere

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The Answer of Identify the geometric object that is represented by parametric equations $\mathbf { r } ( t , s ) = \langle s \cos t , s \sin t , t \rangle$ .
A)A plane
B)A cone
C)A straight line
D)A circular cylinder
E)A circle
F)A circular disk
G)A helix
H)A sphere

Identify the Geometric Object That Is Represented by Parametric Equations r(t,s)=⟨scos⁡t,ssin⁡t,t⟩\mathbf { r } ( t , s ) = \langle s \cos t , s \sin t , t \rangler(t,s)=⟨scost,ssint,t⟩

Identify the Geometric Object That Is Represented by Parametric Equations $\mathbf { r } ( t , s ) = \langle s \cos t , s \sin t , t \rangle$