Unit vector

Unit vector is a way of writing vectors and their components. The unit vector coordinates are denoted as 'i-hat', 'j-hat' and 'k-hat', respectively.

Because of the angle between the axes, the length of a certain vector (or its unit vector) can be calculated using the Pythagoras theorem. If 'A-arrow' is the unit vector of a certain point, the length of vector can be calculated from modulus |'A-arrow'|, which can be written as:


 * 'A-arrow'| = √A(x)² + A(y)² + A(z)²