Question

Two vectors p and q. Angle between them is 30. Waht is the angle between p+q and p

Answer 1

Answer:

The angle between (P + Q) and ( P - Q ) depends on both the magnitudes and directions of the two vectors P and Q. On the other hand if P = 3 i and Q = 2 i, the P + Q = 5 i and P - Q = i. Now the angle is zero. The angle will be 90 degrees iff the two vectors are equal in magnitude but not parallel.