Derive the matrix for the transformation that rotates a point (x,y,z) counterclockwise about the y-axis through an angle (X). My book gives me a matrice for the y-axis move. (cosX 0 sinX) (0 1 0 ) (-sinX 0 cosX) call the above matrix [A] Im also given this formula for a unit vector cos(V)i + cos(W)j + cos(Y)k The way that I see the question, is that I need to somehow derive matix [A] from the given unit vector formula. I just dont see exactly how they are connected here. I really DON'T want the solution for this, just some insight maby on the connection between the formula and the matrix. I know that if I have a vector u and an angle (X) I can just multiply Au to get the rotated vector. So I do know how to use the matrix.