Cos86°cos34°-sin86°sin34°
Matematika
Hendra560
Pertanyaan
Cos86°cos34°-sin86°sin34°
1 Jawaban
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1. Jawaban Anonym149
masukkan rumus cos(x+y)
cosxcosy-sinxsiny
cos86cos34-sin86sin34
=cos(86+34)
=cos(120)
=-1/2