Find the unit vector in the direction of vector where P and Q are the points (1, 2, 3) and (4, 5, 6), respectively.


So, and


Now we want to find the





Now, we have to find the unit direction in the direction of .We know that unit vector means that the magnitude of the vector is 1(unit).


It is defined as


So, we find the magnitude of first.




8
1