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