The popular amusement ride known as the corkscrew has a helical shape. The parametric equations for a

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The popular amusement ride known as the corkscrew has a helical shape. The parametric equations for a circular helix are

x = a cos t

y = a sin t

z = bt

where a is the radius of the helical path and b is a constant that determines the “tightness” of the path. In addition, if b > 0, the helix has the shape of a right-handed screw; if b < 0, the helix is left-handed.

Obtain the three-dimensional plot of the helix for the following three cases and compare their appearance with one another. Use 0 ≤ t ≤ 10π and a = 1.

a. b = 0.1

b. b = 0.2

c. b = -0.1

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