1. The problem statement, all variables and given/known data The force vector FA has a magnitude of 90.0 newtons and points due east. The force vector FB has a magnitude of 135 newtons and points 75° north of east. Use the graphical method and find the magnitude and direction of (a) FA - FB (give the direction with respect to due east) and (b) FB + FA (give the direction with respect to due west). 3. The attempt at a solution So confused here. I have tried this all kinds of ways and cannot get the answer the book came up with. I have tried: a. R = sqrt((90)^2 + (135)^2) = 162 N For direction I did tan-1 (135/90) = 56.3 degrees South of east. B. Same answer just N. of east. The book sais the answer are 142 N for both and 67 degrees. Help!!!!! I need step by step because I just don't get it. This is not for a homework assignment I am just doing the odds out of the back of the book for practice for our test.