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What ratio would be used to find x? X,20,54
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What ratio would be used to find x? X,20,54

User Carl Von Stetten
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1 Answer

3 votes

By definition:


\cos (angle)=\frac{\text{adjacent side}}{\text{ hypotenuse}}

From the picture,


\cos (20^o)=(54)/(x)

User Garet
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