tolong banget kk,sebisanya aja pun gk papa. senin dikumpul, karena gk tau mangka bertanya:)

A (2,-30° ) = (2cos30°, 2sin30°)
' = { 2.(1/2)akar3, 2.1/2 }
= (akar3, 1 )
,B. (4, 120° ) = (4cos120°, 4sin120°)
= (4.-1/2, 4.(1/2)akar 3)
= ( -2, 2akar3 )