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Dik : ᶿ = 60°
r = 5
*koordinat kartesius = sumbu x,y
x= r. Cos ᶿ
x= 5. Cos 60°
x= 5. 1/2
x= 5/2
y= r. sin ᶿ
y= 5. sin 60°
y= 5. 1/2√3
y= 5/2√3
Jadi koordinat kartesiusnya = (5/2 , 5/2√3)
B. (5,120°)
Dik : ᶿ = 120°
r = 5
x= r. Cos ᶿ
x= 5. Cos 120°
x= 5. -Cos (180-60)
x= 5. -Cos 60°
x= 5. -1/2
x= -5/2
y= r. sin ᶿ
y= 5. sin 120°
y= 5. sin (180-60)
y= 5. sin 60°
y= 5. 1/2√3
y= 5/2√3
Jadi koordinat kartesiusnya = (-5/2 , 5/2√3)
maaf kalau salah