If A and B are non-zero vectors which obey the relation | A + B |=| A - B | , then the angle between them is

Step-by-step solution

aligned & | A + B |=| A - B | & | A |^2+| B |^2+2| A || B | & =| A |^2+| B |^2-2| A || B | & =0 =90^ aligned