1. The problem statement, all variables and given/known data Sketch the vector difference D = A - B I have found F = A + B. 2. Relevant equations A(x) = AcosTHETA A(y) = AsinTHETA B(x) = BcosTHETA A(y) = BsinTHETA R = sqrt(rx^2 + ry^2) 3. The attempt at a solution As opposed to the F = A + B I have tried changing the signs of B or multiplying B(x) = -BcosTHETA etcetera and I can't come with the right solution. Do I need to put the angle 37 degrees in the second quadrant? I am confused as how to find -B as A is going to be the same as the first equation (F = A + B).