Question

If $\overrightarrow{P}.\overrightarrow{Q}=PQ,$ then the angle between $\overrightarrow{P}$ and $\overrightarrow{Q}$ is

• A. $0^o$
• B. ${30}^o$
• C. ${45}^o$
• D. ${60}^o$

Answer 1

The correct option is A $0^o$

$\cos \theta =\frac{\overrightarrow{P}.\overrightarrow{Q}}{PQ}$
$\therefore \cos \theta =1$
$\therefore \theta =0^o$