1. The problem statement, all variables and given/known data Force A has a magnitude of 200 lb and points 35deg N of W. Force B points 40deg E of N. Force C points 30deg W of S. The resultant of the three forces has a magnitude of 260 lb and points 85deg S of W. Find the magnitude of forces B and C. 2. Relevant equations A+B+C=R(resultant) Ax+Bx+Cx=Rx Ay+By+Cy=Ry 3. The attempt at a solution So this is what I tried: Ax+Bx+Cx=Rx -200cos35 + Bsin40 - Csin30 = -260cos85 -163.8304 + Bsin40 - Csin30 = -22.6605 Bsin40 - Csin30 = 141.1699 Ay+By+Cy=Ry 200sin35 + Bcos40 - Ccos30 = -260sin85 114.7153 + Bcos40 - Ccos30 = -259.0108 Bcos40 - Ccos30 = -373.7261 This is what I tried but I still can't find the magnitude of B and C. Should I use system of equations to find B and C? Am I even on the right track?