1. The problem statement, all variables and given/known data http://img22.imageshack.us/img22/1254/10031833.jpg [Broken] 2. Relevant equations 3. The attempt at a solution My attempt was based on the idea that both triangles formed by the vector components (x component, y component, and the hypotenuse which is the magnitude of the vector itself) would be similar. I took the length of each of the sides, -3.20 for x and 2.10 for y and individually solved for the unit vector by setting up this relationship: (length of component)/(length of hypotenuse)=(length unit component)/1 The system rejected both of my answers. For x i got -0.836 and for y i got 0.549.