Compute the line integral of v = (r cos2 ) r ?? (r cos sin )

Compute the line integral of v = (r cos2 θ) r ?? (r cos θ sin θ) θ + 3r Ф around the path shown in Fig. 1.50 (the points are labeled by their Cartesian coordinates). Do it either in cylindrical or in spherical coordinates. Check your answer, using Stokes' theorem.

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(1,0,0) X 2 (0,1,2) (0,1,0) y