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Please help!!!!!!!!!
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2 votes
Please help!!!!!!!!!

Please help!!!!!!!!!-example-1
User Julien Deniau
by
6.4k points

1 Answer

3 votes

Answer:

D

Explanation:

Using the cosine ratio in the right triangle

cos CBA =
(adjacent)/(hypotenuse) =
(BC)/(AB) =
(3)/(9) , thus

∠ CBA =
cos^(-1) (
(3)/(9) ) ≈ 70.53° ( to 2 dec. places )

User Michael Guild
by
5.3k points
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