Question

Nomer 26.. sama cara ya makasih

Answer 1

2 sin² x + sin x - 1 = 0

(2 sin x - 1) (sin x + 1) = 0

2 sin x - 1 = 0
2 sin x = 1
sin x = 1/2
x = 30°

sin x + 1 = 0
sin x = -1
x = 270°

Himpunan Penyelesaian: {30°, 270°}

Jawaban: B