Inner product operations

nWe can measure how far
along an axis provided by one of the basis vectors a given **v **is by
using the inner product operator.
nLet **v** be defined in
the **x,y** basis and let **p,q** be and alternative orthonormal basis. The point **v** in
terms of **p,q** is given by the vector [**p.v,q.v**]