Here's the question you clicked on:
Romero
How do you find the orthogonal complement of a vector space. Well I do know that the orthogonal complement needs to have vectors that are orthogonal to the vectors in the Vector so I'm thinking of setting up a Matrix multiplication of the spaces and see when I get zero. Any clues?
If we think of matrix multiplication as a collection of dot products then if Ax = 0 then x is orthogonal to each of the rows of A
whoops sorry wrong question. Let me post a new one.