Question

21) Find the measure of angle B.

Answer 1

Answer:

∠ B ≈ 56.3°

Step-by-step explanation:

Using the cosine ratio in the right triangle

cos B = $\frac{adjacent}{hypotenuse}$ = $\frac{BC}{AB}$ = $\frac{5}{9}$ , then

B = $cos^{-1}$ ($\frac{5}{9}$ ) ≈ 56.3° ( to the nearest tenth of a degree )