Hitunglah unsur unsur segitiga ABC lainnya jika diketahu sudut ABC b: 30 cm C:20 cm dan B 47°

b/sin B = c/sin C
30/sin 47 = 20/sin C
sin C = 20sin47/30
sin C = 14,63/30
<C = 28,19°

<A = 180 -(28,19+47) = 104,81°

a/sin A = b/sin B
a/sin 104,81 = 30/sin 47
a = 30 sin 104,81 / sin 47
a = 29/0,73
a = 39,65cm