Question: Show that at every point on the curve r(t) = (e t cos t, e t sin t, e t ) the angle between the

Show that at every point on the curve
r(t) = (e^t cos t, e^t sin t, e^t)
the angle between the unit tangent vector and the z-axis is the same. Then show that the same result holds true for the unit normal and binormal vectors.

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