Tentukan koordinat cartesius jika diketahui koordinat kutub P (4,210°)​

P(4 , 210°)

r = 4

a° = 210°

x = r.cos a°

x = 4.cos 210°

x = 4.(-1/2 V3)

x = -2V3

y = r.sin a°

y = 4.sin 210°

y = 4.(-1/2)

y = -2

Jadi koordinat cartesius titik P(-2V3 , -2)