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Bab Trigonometri
Matematika SMA Kelas XI

aturan sinus
AB / sin C = BC / sin A
AB / BC = sin 30° / sin 45°
AB : BC = 1/2 : 1/2 √2
✩ coret 1/2 ✩

AB : BC = 1 : √2

◎◎ D ◎◎

Mapel : Matematika
Kelas : X SMA
Bab : Trigonometri

Pembahasan :
Aturan Sinus

AB/Sin C = BC/Sin A
AB/BC = (Sin C/Sin A)
AB/BC = (Sin 30°/Sin 45°)
AB/BC = [(1/2)/(1/2 √2)
AB/BC = 1/√2

AB : BC = 1 : √2