The angle made by the vector $\left( {\hat i\,\, + \;\,\hat j} \right)$ with $x-$ axis and $y$ axis is
$45^o, 60^o$
$60^o, 60^o$
$45^o, 45^o$
$60^o, 45^o$
Which of the following is the unit vector perpendicular to $\overrightarrow A $ and $\overrightarrow B $
Obtain the scalar product of unit vectors in Cartesian co-ordinate system.
A vector ${\overrightarrow F _1}$is along the positive $X-$axis. If its vector product with another vector ${\overrightarrow F _2}$ is zero then ${\overrightarrow F _2}$ could be