Penyelesaian dari persamaan trigonometri sin x/2 = sin phi/4 , 0

sin x/2 = sin 180° /4
x = 2(180°) /4
x = 90°

=>>sin 45°= 1/2√2

Bab Trigonometri
Matematika SMA Kelas X

sin x/2 = sin π/4
x/2 = π/4
x = π/2

sin x/2 = sin 3π/4
x/2 = 3π/4
x = 3π/2

HP = { π/2, 3π/2 }