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In ABC , cos B = 3/25 and angle A is 90 degrees. What is cos C?

 Nov 19, 2021
 #1
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cos c = sin b

 

sin^2 + cos ^2 = 1

sin^2 = 1 - (3/25)^2

sin^2 = 616/625       sin b = cos c =   sqrt (616)  / 25      <====  simplify as needed......

 Nov 19, 2021
 #2
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Good job!

Guest Nov 19, 2021

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