ubah titik B(4,4√3) menjadi koordinat kutub

r^2 = 4^2 + (4akar3)^2 = 16 + 48
r^2 = 64
r = akar64
r = 8

Tan @ = 4akar3/4 = akar3
tan @ = tan 60
@ = 60°

Jd koordinat kutub (8, 60°)