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α = 300 drajat (kUADRAN IV)
x = r cosα = 7.cos300 drajat = 7.1/2 = 3,5
y = r sinα = 7 sin300 drajat = 7.-1/2 √3 = -3,5 √3
Sehingga koordinat cartesius ( 3,5 , -3,5√3)