cos(π/3 + 3 x) = cos ( - π/5)
Matematika
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Pertanyaan
cos(π/3 + 3 x) = cos ( - π/5)
1 Jawaban
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1. Jawaban SadonoSukirno
cos (π/3 + 3x) = cos (-π/5)
cos (π/3 + 3x) = cos (π/5)
cos (180/3 + 3x) = cos (180/5)
cos (60+3x) = cos (36)
60 + 3x = 36
3x = 36 - 60
x = -24/3 = -8°