Question

7. If A + B = A - B and neither A nor B vanish, then:
(a) A and B are parallel and in the same direction
(b) A and B are in opposite directions
(c) the angle between A and B is 45.
(d) the angle between A and B is 60-
(e) A is perpendicular to B​

Answer 1

Explanation:

a may be the write answer