In ABC , cos B = 3/25 and angle A is 90 degrees. What is cos C?
Cos C will equal Sin B
Find sin b
(3/25)2 + sinb 2 = 1
9/625 + sin^2 = 1
sin^2 = 616/625
sin b = cos c = sqrt(616)/25 simplify as needed.....
+36916 
