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Find the curve's unit tangent vector. Also, find the length of the indicated portion of the curve r(t) = (4cost)i + (4sint)j + (v2t)k, Osten

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Find the curve's unit tangent vector. Also, find the length of the indicated portion of the curve r(t) = (4cost)i + (4sint)j + (v2t)k, Osten Find the curve's unit tangent vector. T(t) k The length of the curve is (Type an exact answer, using it as needed.)

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