Problem 313 | Equilibrium of Concurrent Force System

Problem 313
Figure P-313 represents the concurrent force system acting at a joint of a bridge truss. Determine the value of P and E to maintain equilibrium of the forces.



Solution 313



how did you get the 92.82?

by transposing the 300 to the other side and divide it by cos(60)

Can you please show us how? I still can't figure it out