Ubahlah koordinat kutub ke koordinat cartesius R (20,300°)

Bab Trigonometri
Matematika SMA Kelas X

koordinat Kartesius
x = r . cos β
x = 20 . cos 300°
x = 20 . 1/2
x = 10

y = r sin β
y = 20 . sin 300°
y = 20 . -1/2√3
y = -10√3

(x,y) = (10,-10√3)