Koordinat cartesius dari titik (2,210°)adalah

Kelas 10 Matematika
Bab Koordinat Kutub

x = r . cos a
x = 2 . cos 210°
x = 2 . (-1/2 √3)
x = -√3

y = r . sin a
y = 2 . sin 210°
y = 2 . (-1/2)
y = -1

(-√3, -1)

(r, A) ==> (r cps A, r sin A)
= ( 2 cos 210°, 2 sin 210,°)
= (2.-1/2V3, 2.-1/2)
= ( -V3, -1)