Two vectors`vec A` and `vec B` are such that `vec A+ vec B = vec C` and `A^2 +B^2=C^2`. If `theta` is the angle between positive direction of `vec A` and `vec B`, then mark the correct alternative.

Options

A. `theta=0`
B. `theta= pi/2`
C. `theta=(2pi)/3`
D. `theta =pi`

Answer

B