1) A point moves along a circle with position vector given by r(t) =< cos (t)², sin(t)² > a) Write a (t) as a combination of r(t) and (t), for t = 0. b) Find the unit tangent vector (t) for t = 0. c) Find the unit normal vector Ñ(t) for t = 0.

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A: To tell what is the correct answer gor part(b).

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