Cos x = -1 , 0 ≤ x ≤ 2 Π
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Pertanyaan
Cos x = -1 , 0 ≤ x ≤ 2 Π
1 Jawaban
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1. Jawaban yuzar98
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cos x = - 1
cos x = cos π
x = π +k. 2π atau x = -π + k. 2π
k=0 → x = π atau x= -π
k=1 → x = 3π atau x = π
0 < x < 2π
x = π