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 <–––––
Explanation:
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