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A=45°
B=30°
AC=12 cm
ditanya : BC=..?
Sin A=BC/AC
Sin 45°=BC/12
1/2√2=BC/12
BC=1/2√2×12
BC=6√2 cm
Jawaban opsi B.
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DETIL JAWABAN :
Mapel : Matematika
Kelas : 10
Bab : Trigonometri