tolong butuh sekali Ubahlah Ke koordinat kertasius

a)
sin 150= y/r
1/2 = y/8
y=4

cos 150= x/r
-√3/2=x/8
x= - 4√3
koordinat kartesius (x;y)=(-4√3;4)

b)
sin 240=y/r
-√3/2=y/16
y= -8√3

cos 240=x/r
-1/2=x/16
x= -8
koordinat kartesius (x;y) = (-8;-8√3)

c)
sin 315=y/r
-√2/2=y/20
y= -10√2

cos 315= x/r
1= x/20
x= 20
koordinat kartesius (x;y)=(20;-10√2)