Coordinat cantesius (2.210 drajat)adalah

Bab Trigonometri
Matematika SMA Kelas X

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

(x, y) = (-√3, -1)

Mapel : Matematika
Kelas : X SMA
Bab : Trigonometri

Pembahasan :
Koordinat Kutub (2 , 210°)

Cos β = x/r
x = r . Cos β
x = 2. Cos 210°
x = 2 . (-1/2 √3)
x = - √3

Sin β = y/r
y = r . Sin β
y = 2 . Sin 210°
y = 2 . (-1/2)
y = -1

Koordinat Kartesius (x , y)
Koordinat Kartesius (-√3 , -1)