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= √25 + ( 25√9)
= √25 + 75
= √100
= 10
arc tan = y/x
= 5√3 / 5
= √3
= 60
L = tan ( 360 - 60)
= 300 drajat
koordinatnya = { 10 , 300 drajat)
Koordinat kutubnya : P(10,120°)