They are unit vectors parallel to the coordinate axes, usualyOriginally Posted by Quick
Firstly,Originally Posted by Quick
it is not , if you are writing on paper and do not want to draw a bold line you write (with an arrow on top).
Let me explain it differently.
This is a vector,
where, are called vector-components.
Basically you are in 3 dimensions. Instead of 2 (xy graph) you know have an xyz graph. So think of a point located at now from that point draw a line to the orogin the resulting line would be called a vector defined by