# Unit vectors

- Author:
- Krishna Bahadur Bista

- Topic:
- Vectors

## Standard Unit Vectors

The unit vectors along the coordinate axes are called the standard unit vectors. They are denoted by acting along X-, Y- and Z- axes respectively as shown in the figure.

In terms of coordinates , and . In case of plane vectors, and . There will be no unit vector along the Z-axis.

(i) Every plane vector is of the form a

_{1}+b_{1}and conversely. (ii) Every space vector is of the form a_{1}+b_{1}+c_{1}