cos^2x-sin^2x=0 ... plis bantu jawab....!!!!!
Matematika
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Pertanyaan
cos^2x-sin^2x=0 ... plis bantu jawab....!!!!!
1 Jawaban
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1. Jawaban SadonoSukirno
cos²x - sin²x = 0
cos 2x = 0
cos 2x = cos 90
2x = 90°
x = 45°