$\"\"$

The vectors are $\"\"$ and $\"\"$ .

Angle between the two vectors is $\"\"$ .

Magnitude of $\"\"$ is

$\"\"$

Magnitude of $\"\"$ is

$\"\"$

Dot product of $\"\"$ and $\"\"$ is $\"\"$ .

Substitute corresponding values in $\"\"$ .

$\"\"$

Angle between the vectors is $\"\"$ .

Thus, the two vectors are parallel and their heads are in opposite direction.

$\"\"$

The two vectors are parallel and their heads are in opposite direction.