vectos

Vector addition - v + u = + =

Vector subtraction - v – u = - =

Vector multiplication – kv = k =

To find a vector from 2 points do P2 – P1

Vector equation - (x, y) = (x˳, y˳) + t(a, b)

Parametric equations:

x = x˳ + at

y = y˳ + bt 

magnitude of a vector

-|u| = sqrt x^2 + y^2     

Example 1: Finding the magnitude/ lenght

http://www.youtube.com/watch?v=6GoMXuE1FOw

Example 2: Addition and subtraction of vectors

http://www.youtube.com/watch?v=3yxYAy7cCBQ&feature=related