Whats his mistake and the correct awnser

Lxyu asked Jul 28, 2022

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23 votes

Lxyu asked Jul 28, 2022

by Lxyu

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16 votes

Answer:

θ ≈ 35.7°

Explanation:

His mistake was in using the wrong trig. ratio

Instead of using cosine he should have used the sine ratio

sinθ =
(opposite)/(hypotenuse) =
(7)/(12) , then

θ =
sin^(-1) (
(7)/(12) ) ≈ 35.7° ( to the nearest tenth )

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