2 cos²x + sin (180/2 -2x) - 6 = 0 tentukan nilai cos x
Matematika
syukron15
Pertanyaan
2 cos²x + sin (180/2 -2x) - 6 = 0 tentukan nilai cos x
1 Jawaban
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1. Jawaban Anonyme
Bab Trigonometri
Matematika SMA Kelas X
2 cos² x + sin (180/2 - 2x) - 6 = 0
2 cos² x + cos 2x - 6 = 0
2 cos² x + 2 cos² x - 1 - 6 = 0
4 cos² x - 7 = 0
4 cos² x = 7
cos² x = 7/4
cos x = √(7/4)
cos x = 1/2 √7