1. The problem statement, all variables and given/known data A screenshot of the problem: http://img246.imageshack.us/img246/9194/homeworkkd6.jpg [Broken] 2. Relevant equations Not sure... possibly the dot product of two vectors? v*w = a(1)a(2) + b(1)b(2) 3. The attempt at a solution Part of the problem is that I'm not entirely sure what the question is asking for. I think it's talking about the coefficents for the two vectors which will allow those vectors to produce the same vector as X. I tried plugging (2*pi/5) into the equations above and adding them together giving me (using decimal approximations because I don't know how to find the exact values): U + V = -.642 I + 1.260 J Then I try replacing X for: 8I + 3J = -.642 I + 1.260 J Which doesn't make much sense to me... should I treat I and J as variables and solve for them? I think I'm on the completely wrong track.