Answer:
Step-by-step explanation:
The rule for Cos is Cosine = adjacent over hypotenuse which means which ever side is closest to the angle(24) (not hypotenuse). And the Hypotenuse which is the longest side so (25).
So now we have Cos(a) = Cos([tex]\frac{24}{25}[/tex]) = 0.57351998607
