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Find the missing side. Round to the nearest tenth. 3) 13 72° хtrigonometry

Find The Missing Side Round To The Nearest Tenth 3 13 72 Хtrigonometry class=

Answer :

By definition,

cos(angle) = adjacent/hypotenuse

From the picture,

cos(72°) = x/13

cos(72°)*13 = x

4 = x

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