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Find the curve's unit tangent vector. Also, find the length of the indicated portion of the curve. r(t)= (9cos3t)j+ (93in3t) k, Ostsg Find the curve's

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Find the curve's unit tangent vector. Also, find the length of the indicated portion of the curve. r(t)= (9cos3t)j+ (93in3t) k, Ostsg Find the curve's unit tangent vector. T(t)= - cos t'j+ sin t'k The length of the curve is E. (Type an exact answer, using II: as needed.)

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