Answer:
∠ B ≈ 29.74°
Step-by-step explanation:
using the tangent ratio in the right triangle
tan B = [tex]\frac{opposite}{adjacent}[/tex] = [tex]\frac{AC}{BC}[/tex] = [tex]\frac{4}{7}[/tex] , then
∠ B = [tex]tan^{-1}[/tex] ( [tex]\frac{4}{7}[/tex] ) ≈ 29.74°
