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3. (15 points) Find the unit tangent vector T(t) for the curve below and then calculate its value at the given value of t. r(t)

3. (15 points) Find the unit tangent vector T(t) for the curve below and then calculate its value at the given value of t. r(t) = (8, 3 sin 21', 3 cos 2t),for0 S t Earn = 7r/4

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