Question: Consider the ellipse r(t) = (2 cos t, 8 sin t, 0), for 0 t 2. Find all points on the ellipse at

Consider the ellipse r(t) = (2 cos t, 8 sin t, 0), for 0 ≤ t ≤ 2π. Find all points on the ellipse at which r and r' are orthogonal.

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