1 Answer

Answerrer · Answer 1 · 2023-07-25T15:10:54+0000

Answer:

d

Explanation:

using the cosine ratio in the right triangle

cos B =
(adjacent)/(hypotenuse) =
(BC)/(AB) =
(2)/(10) , then

B =
cos^(-1) (
(2)/(10) ) ≈ 78.46° ( to 2 dec. places )

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