Question

If the scalar product of two vectors is maximum, then the vectors

• A. are parallel to each other.
• B. are perpendicular to each other.
• C. can have any orientation.
• D. are anti-parallel to each other.

Answer 1

The correct option is A are parallel to each other.

The scalar product will be maximum when $\cos \theta$ will be maximum.
$\Rightarrow \theta =0^{\circ }$, hence, the vectors will be parallel to each other.