gmna ini kak bingung

Kelas 11 Matematika
Bab Trigonometri Lanjut
Kata Kunci : Aturan Sinus

a/sin A = c/sin C
10/sin 60° = c/sin 30°
c = (10 . 1/2) / (1/2 √3)
c = 10/√3 . (√3)/(√3)
c = (10/3) √3

✩✩ B ✩✩