sin 30°cos 60° - cos 30° sin 60°=????
Matematika
intansrioktaviani
Pertanyaan
sin 30°cos 60° - cos 30° sin 60°=????
1 Jawaban
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1. Jawaban bintanghuda
sin 30°cos 60° - cos 30° sin 60°
= 1/2 * 1/2 - 1/2akar3*1/2akar3
=1/4 - 3/4
=-2/4
=-1/2