I have the parametrization:

r(t)= -6sin^2x(i+j) - 3sin2x k , X [0, pi]

If the vector field V(x, y, z) = (1+y/3)j + z/3k

What is the line integral I= integral c (V.dr)

r, i, j, k, dr and V are all vectors.

integral c is the contour integral.

Thanks