cos 3X*=cos 180*0 <× <360
Matematika
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Pertanyaan
cos 3X*=cos 180*0 <× <360
1 Jawaban
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1. Jawaban Anonyme
cos(3x) = cos180
3x = 180 + 360k
x = 60 + 120k
k = 0 → x = 60°
k = 1 → x = 180°
3x = -180 + 360k
x = -60 + 120k
k = 3 → x = 300°
hp = {60°, 180°, 300°}