Answer:
SinB = Sin30 = 0.5
Step-by-step explanation:
Ok lets use sine rule
a/SinA = b/SinB = c/SinC
a/Sin60 = b/SinB = 12/Sin90
b/Sin30 = 12/Sin90
b = (12 × Sin30) ÷ Sin90
b = (12 × 0.5) ÷ 1
b = 6cm
