cos75cos15+sin75sin15
Matematika
devitriyani2
Pertanyaan
cos75cos15+sin75sin15
1 Jawaban
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1. Jawaban Anonyme
jawab
cos (A - B) = cos A cos B + sin A sin B
cos 75 cos 15 + sin 75 sin 15 = cos (75 - 15)
= cos 60
= 1/2