Sistem koordinat kartesius dari(0,2/3)

Bab Koordinat Kutub
Matematika SMA Kelas X

(x , y) = (0, 2/3) 

r = √(x² + y²)
  = √(0² + (2/3)²)
  = √(2/3)²
  = 2/3

sin α = y/r
sin α = (2/3) / (2/3)
sin α = 1
     α = 90°

(2/3, 90°)

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