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In right triangle ABC with angle B = 90, we have AB = 6 and BC = 10. Find cos A.

Answer with an exact number.

 Feb 6, 2021
 #1
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Find hypotenuse via Pythag Theor

  hyp = sqrt(10^2 + 6^2) =  sqrt 136

 

 

Cos A = adj / hyp = 6/sqrt136 = 3/(sqrt 34)   

 Feb 6, 2021

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