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10-02-2021
Mathematics

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10-02-2021

Answer:

A. 12.6

Step-by-step explanation:

Sine = opposite/hypotenuse. In this case, RU is the opposite of angle N and RN (21) is the hypotenuse.

sin(37) = RU/21

RU = sin(37)*21

RU = 0.602*21

RU ≈ 12.6

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