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Kelas 10 MatematikaBab Koordinat Kutub
(3, 210°)
x = r . cos a
x = 3 . cos 210°
x = 3 . (-1/2 √3)
x = (-3/2) √3
y = r . sin a
y = 3 . sin 210°
y = 3 . (-1/2)
y = -3/2
(-3/2 √3, -3/2)