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

Find the curve's unit tangent vector. Also, find the length of the indicated portion of the curve. r(t) = (4t sint + 4 cost)i + (-4t cost + 4 sint)j v/2 sts2

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