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2-79. The mast is subjected to the three forces shown. Determine the coordinate direction angles a, B1, 71 of F so that the resultant

2-79. The mast is subjected to the three forces shown. Determine the coordinate direction angles a, B1, 71 of F so that the resultant force acting on the mast is zero. F3 = 300 N X 1 Y1 F B VF = 200 N Probs. 2-78/79

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