Evaluate the line integral Vop-dr for the following function op and oriented curve C (a) using a parametric description of C and evaluating the integral directly, and (b) using the Fundamental Theorem for line integrals. (x,y) = xy; C: r(t)=(sint, cost), for 0 stx (a) Set up the integral used to evaluate the line integral using a parametric description of C. Use increasing limits of integration. dt (Type exact answers.)