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Tan²x - secan x + 3 = 0, 0 ≤ x ≤ 360
Tan²x - secan x + 3 = 0, 0 ≤ x ≤ 360
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Verified answer
TriGonoMetRitan² 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..
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