117. Find the distance vector between P
(1, 2, 3) and P
(1, 2, 3)
in Cartesian coordinates.
118.Find the angle q between vectors A and B of Example 3.1 using the cross product between them.
119. Find the angle that vector B of Example 3-1 makes with the z-axis.
120. Vectors A and B lie in the y-z plane and both have the same magnitude of 2 (Fig). Determine (a) A B and (b) A B.