Dot product of two mutual perpendicular vector is
$0$
$1$
$\infty$
None of these
Write the necessary condition for the scalar product of two mutually perpendicular vectors.
The area of the parallelogram whose sides are represented by the vectors $\hat j + 3\hat k$ and $\hat i + 2\hat j - \hat k$ is
Show that the scalar product of two vectors obeys the law of commutative.