1- cos 2x / 1- cos^2 x
Matematika
MILAHAF
Pertanyaan
1- cos 2x / 1- cos^2 x
1 Jawaban
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1. Jawaban Cadilac
1-cos2x/1-cos²x=2
1-cos2x/sin²x=2
1-(1-2sin²x)=2sin²x
1-1+2sin²x=2sin²x
2sin²x=2sin²x
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