3 years ago

Please help!!!!!!!!!

1 answer:

3 0

Answer:

Step-by-step explanation:

Using the cosine ratio in the right triangle

cos CBA = $\frac{adjacent}{hypotenuse}$ = $\frac{BC}{AB}$ = $\frac{3}{9}$ , thus

∠ CBA = $cos^{-1}$ ( $\frac{3}{9}$ ) ≈ 70.53° ( to 2 dec. places )

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