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Trignometric functions:solve for x, round to nearest 10th

User Dynamikus
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1 Answer

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We can relate the anglex, the leg 8.6 and the hypotenuse 12 by means of the cosine function, that is,


\cos x=(8.6)/(12)

which gives


\cos x=0.71666

By applying inverse cosine in both sides, we have


x=\cos ^(-1)(0.7166)

then, x is equal to


x=44.22\text{ degre}es

Then, by rounding to the nearest tenth, the answer is 44.2 degrees

User Rpechayr
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4.9k points