calculus III

5. Find the points on the plane curve repIeeented by t) = (cmt),sin4(t}} at which the curve is not smooth. 1 x/i 6. Find the arc length of the curve given by t) = 5:3 + ?t2 3+ 1' is; with 0 <_: t find the unit tangent vector of curve ein tees at v5 calculate enlvatnre given by gig is point where>