Specify The Magnitude F3 And Directions 9453 9463 And 9473 Of F3

Specify the magnitude F3 and directions α3, β3, and γ3 of F3 so that the resultant force of the three forces is FR.
Units Used:
kN = 103 N

Given:
F1 = 12kN c = 5
F2 = 10kN d = 12
θ = 30 deg
FR = (0 9 0)kN

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