Prove that the parallels through to the origin to the binormals of the helix     r= (acost,asint,kt) Lie on the right circular cone a^2(x^2+y^2)=k^2z^2

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter9: Surfaces And Solids
Section9.4: Polyhedrons And Spheres
Problem 48E: Sketch the solid that results when the given circle of radius length 1 unit is revolved about the...
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Prove that the parallels through to the origin to the binormals of the helix 

   r= (acost,asint,kt)

Lie on the right circular cone a^2(x^2+y^2)=k^2z^2

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