Find the curve's unit tangent vector. Also, find the length of the indicated portion of the curve. r(t) = (2t sint + 2 cost)i + ( -2t cost + 2 sint)j #2 sts2 The curve's unit tangent vector is KFind the arc length parameter along the given curve from the point where t=0 by evaluating the integral s(1) = |v(t)| dt. Then find the length of the indicated portion of the curve 0 r(t) = 6costi + 6sint j + 4t k, where 0 st=