If Vectors P, Q And R Have Magnitude 5, 12 And 13 Units And P+ Q = R , The Angle Between Q And R Is?
If vectors P, Q, and R have magnitude 5, 12 and 13 units and P+ Q = R, the angle between Q and
R is?
(1) cos-1 5/12
(2) cos-1 5/13
(3) cos-1 12/13
(4) cos -1 7/13
asked Jun 12 12:00:00 AM