Question

Formula of finding direction in unit vectors when two co-ordinates are given

Answer 1

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Answer 2

Some of the most important formulas for vectors such as the magnitude, the direction, the unit vector, addition, subtraction, scalar multiplication and cross product are presented.

Vector Defined by two Points

The components of a vector  defined by two points  and  are given as follows
In what follows ,  and  are 3-D vectors given by their components as follows 


Magnitude of a Vector

The magnitude of vector  written as  is given by