Sin 2× = 1/2 0 < × < 360°

Bab Trigonometri
Matematika SMA Kelas X

sin 2x = 1/2

2x = 30°
x = 15°

2x = 150°
x = 75°

2x = 30° + 1 x 360°
2x = 390°
x = 195°

2x = 150° + 1 x 360°
2x = 510°
x = 255°

HP = { 15°, 75°, 195°, 255° }