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03-08-2017
Mathematics

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Find the exact values of sin A and cos A. Write fractions in lowest terms. A right triangle ABC is shown. Leg AC has length 15, leg BC has length 20, and hypotenuse AB has length 25.

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03-08-2017

sin A = opposite / hypotenuse = BC/AB = 20/25 = 4/5

cos A = adjacent / hypotenuse = AC/AB = 15/25 = 3/5

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