Question

Two vectors A and B are such that |A+B=A-B). The angle between the vectors A and B is:
(1) 0
(2) π/3
(3)π / 2
(4)π​

Answer 1

Answer:

We have ∣a.b∣=∣a×b∣

⇒∣a∣∣b∣∣cosθ∣=∣a∣∣b∣∣sinθ∣

( where θ is the angle between a and b)

⇒∣cosθ∣=∣sinθ∣⇒θ=

4

π

or

4

3π

But a.b<0,∴θ=

4

3π

Answered By Tamoha

Answer 2

Answer:

If A and B are treated as numbers, then it's solution is zero for both