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Verified answer
Bab TrigonometriMatematika SMA Kelas X
sin (3x - 15)° = sin 45°
3x - 15² = 45°
3x = 45° + 15°
x = 60°/3
x = 20°
sin (3x - 15)° = sin 135°
3x - 15° = 135°
3x = 135° + 15°
x = 150°/3
x = 50°
sin (3x - 15)° = sin 405°
3x - 15° = 405°
3x = 405° + 15°
x = 420°/3
x = 140°
sin (3x - 15)° = sin 495°
3x - 15° = 495°
3x = 495° + 15°
x = 510°/3
x = 170°
HP = { 20°, 50°, 140°, 170° }