$\"\"$

The vector $\"\"$ .

The unit vector in the direction of $\"\"$ is $\"\"$ .

The magnitude of the vector $\"\"$ .

$\"\"$

The unit vector is $\"\"$ .

Let $\"\"$ be the unit vector of $\"\"$ .

$\"\"$

The unit vector in the direction of $\"\"$ is $\"\"$ . $\"\"$

Find the length of unit vector.

$\"\"$

The unit vector has length $\"\"$ .

$\"\"$

The unit vector in the direction of $\"\"$ is $\"\"$ .