Sin120°×Cos240°-Cos120°
Matematika
Marsellanaibuti
Pertanyaan
Sin120°×Cos240°-Cos120°
1 Jawaban
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1. Jawaban shilviyulia
sin 120° = sin (180-60)= sin 60°= 1/2 akar 3
cos 240° = cos (180-60) = -cos 60 = -1/2
cos 120° = cos (180-60) = -cos 60 = -1/2
1/2 akar 3 . -1/2 -(-1/2)
jadi jawabannya 1/2 akar 3
karena -1/2 + 1/2 di coret
semoga membantu :)