is used to denote a vector of length one in the same direction as the vector 
.Unit Vectors:
The tag is used to denote a vector of length one in the same direction as the vector .
Cartesian Coordinate Unit Vectors:
= x-axis unit vector
= y-axis unit vector
= z-axis unit vector
Cartesian Expression for an Arbitrary Vector:
Vector Components of  |
Numerical Components of  |
 |
 |
Vector Sum of Two Vectors:
