Ubahlah koordinat kutub berikut ke koordinat cartesius! a. A(6,30derajat) b. B(2,120derajat)

a. A ( 6,30° )
x = r cos a
= 6 cos 30°
= 6 ( cos 60° )
= 6 ( 1/2 ) = 3

y = r sin a
= 6 sin 30°
= 6 ( sin 60° )
= 6 ( 1/2 √3 ) = 3√3

Jadi, A ( 3,√3 )

b. B ( 2,120° )
x = r cos a
= 2 cos 120°
= 2 ( - cos 30° )
= 2 ( - 1/2 √3 ) = √3

y = r sin a
= 2 sin 120°
= 2 ( sin 30° )
= 2 ( -1/2 ) = -1

Jadi, B ( √3,-1 )