Ubahlah kedalam koordinat cartesius A. (2,240°) dan B (3,30°)

A) r=2 , a=240°
cari x = r . cos a
x=2. cos240°
x=2.-1/2
x=-1
cari, y= r. sin240°
y=2.-1/2√3
y=-√3
koordinat kartesius A(-1,-√3)

B)r=3 , a= 30°
cari x
x= r. cos30°
x=3. 1/2√3
x=3/2√3
cari y
y= r. sin30°
y=3 .1/2
y=3/2
koordinat kartesius B (3/2√3 , 3/2)