Nilai dari cos75° dikali cos15°
Matematika
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Pertanyaan
Nilai dari cos75° dikali cos15°
1 Jawaban
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1. Jawaban Anonym149
cos75= cos(45+30)=cos45cos30-sin45sin30
cos15= cos(45-30)=cos45cos30+sin45sin30
cos75×cos15=1/4