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F1 = 150 N
F2 = 80 N
α = 60
R^2 = F1^2 + F2^2 + 2.F1.F2.cos 60
R^2 = 150^2 + 80^2 + 2.150.80.0,5
R^2 = 22500 + 6400 + 1200
R^2 = 30100
R = √30100
R = 173,5 N
arahnya
sinβ = F2.sin60 /R
sinβ = 80.0,87/ 173,5
sinβ = 0.401
β = arc sin (0.401)
β = 23,6⁰
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