1. The problem statement, all variables and given/known data A pin-jointed frame (diagram attached) is formed of steel rods of 10mm diameter with member AC being 2m long. If a load of 50kN is applied at A as shown, determine the deflection of A and the force in the three rods. Take E = 200kN/mm^2. 2. Relevant equations FA→B = FA→D = FA→C* cos(30)^2 FA→C +2*FA→B cos(30) = 50kN 3. The attempt at a solution Our tutor has given the answers as: FA→C = 21.7kN FA→B=FA→D=16.6kN And he has said FA→C = 50kN/1+2cos(30)^3) But when I solve the equations in for FA→C I actually get= 25.6kN. can anyone help me find my error?