If $|\vec a.\vec b|=|\vec a×\vec b|$, then the angle between $\vec a$ and $\vec b$, is
Answer & explanation
Correct answer: option 4
We have,
$|\vec a.\vec b|=|\vec a×\vec b|$
$⇒|\vec a||\vec b||\cos θ|=|\vec a||\vec b|\sin θ$
$⇒|\cos θ|=\sin θ$
$⇒θ=45°,135°$