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p = 8 satuan
q = 6 satuan
R = 2 satuan
dit : α ?
dijawab :
R = √(F1² +F2² + 2xF1F2 cosα)
R² = 8² + 6² + 2 x 8x 6 x cos α
2² =64 + 36 + 96 cosα
4 = 100 + 96 cosα
cosα = (100-4)/96
cos α = 1
α = 0°