(vectors are bold)
I have an odd issue I suppose.
Given two points, A and B, and the need to generate a vector from them there are two things I can do, A-B=C or B-A=-C. So I end up finding C when the text/instructor wants -C. I have no idea what order to take the points A and B in and I am unaware of a standard. Should I order them by which is the closest to the origin or something?
(If you're confused see Vector Algebra: I think this should link you directly to a section on what method I'm talking about to generate vectors.)