Jawabanmu

2014-04-11T12:43:59+07:00
R= √Xkuadrat + Ykuadrat = √5kuadrat - 5√3 kuadrat = √ 25-75 = √-50 =-5√2 Tan a = y/x = -5√3/5 = -25√3/25 = -√3 Jadi . (-5√2,60°) titik koordinatnya