2 sin ( 90 drjt - × ) =1 ( 0 drjt < × < 90 drjt )

2sin a = 1
sin a = 1/2
sin a = sin 30

2 sin (90-x) = 2 sin 30
90- x = 30
x = 60°

karena intervalnya hanya antara 0=> 90

maka Hp = {60°}

Mapel : Matematika
Kelas : X SMA
Materi : Persamaan Trigono

Pembahasan :
2Sin(90° - x) = 1
Sin (90° - x) = 1/2
Sin (90° - x) = Sin 30°

90 - x = 30° + K . 360°
x = 60° - K . 360°

90° - x = (180 - 30)° + K. 360°
90° - x = 150° + K . 360°
x = -60° - K . 360°

Misal K = 0, maka :
x = 60°
x = -60° (TM)

Misal K = 1, maka :
x = -300° (TM)
x = -420° (TM)

Hp : {60°}