Tentukan himpunan penyelesaiannya! Tan²x - secan x + 3 = 0, 0 ≤ x ≤ 360

TriGonoMetRi

tan² x - secan x + 3 = 0
sin² x/cos²x - cos x/cos² x + 3 cos² x/cos² x = 0
sin² x + 3 cos² x - cos x = 0
(1 - cos² x) + 3 cos² x - cos x = 0
2 cos² x - cos x + 1 = 0

cek nilai diskriminan :
D = b² - 4ac
D = (-1)² - 4.2.1
D = -7
D < 0
Akar2 imajiner..

#cek_soal