2.29 If Jr sin cos o a, - cos 20 sin da, +tan In ra, at T(2, w/2, 3/2), determine the vector component of J that is: (a) Parallel to a (b) Normal to surface o 3m/2 (c) Tangential to the spherical surface r = 2 (d) Parallel to the line y = -2,2 0 T 2 2.30 If H = p²cos da, psin da,, find H a, at point P(2, 60°, -1). 2.31 If rxa,+ya, + za,, describe the surface defined by: (a) ra,+ra, (b) r X a. 10 5