Answer:
Angle B = 39.85°
Step-by-step explanation:
We have sine formula
[tex]\frac{a}{sinA}=\frac{b}{sinB}=\frac{c}{sinC}[/tex]
Here A = 74°, a = 126 and b =84
Substituting
[tex]\frac{126}{sin74}=\frac{84}{sinB}\\\\sinB=0.6408\\\\B=39.85^0[/tex]
Angle B = 39.85°
