Question

The vectors A and B are such that
A+B= A - B . The angle between vectors A and
B is -
[RPMT 1999, AIPMT 2006]
(A) 90°
(B) 60°
(C) 75°
(D) 45°​

Answer 1

Explanation:

The angle between them is 90 degree .

Solution refer in figure.

Thank you.

Answer 2

Explanation:

When Cos theta = 90° .

-----------------------:-------------------------------------