When `A.B =-|A||B|,` then

Options

A. A and B are perpendicular to each other
B. A and B act in the same direction
C. A and B act in the opposite sirection
D. A and B can act in any in any direction

Answer

C

Explanation

(c ) We have A.B `=AB costheta`
Here ,A.B =- AB, , i.e , `cos theta=-1`
`therefore theta =180^(@)`