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26-01-2021
Mathematics

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If the sine of angle a is 15/17 what is the cosine of angle a

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10011813 10011813

26-01-2021

Answer:

sin A = opp/hyp = 15/17

Right triangle

Therefor

a² + b² = c²

adj² + opp² = hyp²

adj² + 15² = 17²

adj² = 17² - 15²

adj² = 289 - 225

adj² = 64

adj = 8

Cos = adj/hyp

cos A = 8/17 <–––––

Step-by-step explanation:

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