##### Practice Final #4 part b wording
ro_co
are the vectors <(a,b), (c,d)> originally written in the standard basis, or is that the basis we want to write them in?
JeffreyLam1: June 4, 2015, 10:56 p.m.
the inner product is in your friend's basis, so you want to multiply by the identity matrix that goes from your friend's basis to the standard basis, which is the given basis for your friend.