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persamaan trigonometri
a.
2 sin² x – 7 sin x + 3 = 0
(2 sin x – 1)(sin x – 3) = 0
sin x = 1/2 atau sin x = 3 TM
sin x = 1/2
x = 30° + k.360° … (1)
sin x = 1/2
x = 150° + k.360°… (2)
k bilangan bulat
[0°,360°]
HP = {30° , 150°}
d.
3 sin x + cos² x – 3 = 0
3 sin x + (1 – sin² x) – 3 = 0
sin² x – 3 sin x + 2 = 0
(sin x – 1)(sin x – 2) = 0
sin x = 1 atau sin x = 2 TM
sin x = 1
x = 90° + k.360°
[0° , 360°]
HP = {90°}