minta bantuanya!! tolong

2a. koordinat cartesius
x= r cos a.
= 6 cos300°
= 6.½
= 3

y = r sin a
= r sin300
= 6. -½√3
= -3√3
(x,y)
(3,-3√3)

b. (-2,2)
r= √x²+y²
=√-2²+2²
= √4+4
=√8
= 2√2

tan a= y/x
=2/-2
-1
tan a=-1
a= 315°
(r,a)
(2√2, 315°)