Anwer: 9 / 41
Step-by-step explanation:
Definition of the function (ratio) cos(x)
cos(angle) = adjacent-leg / hypotenuse
In this case:
- the angle is B,
- the adjacent-leg is 27,
- and the hypotenuse is 123
Therefore: cos(B) = 27 / 123 which can be simplified by 3 to obtain:
27 / 123 = 9 / 41
Answer: 9 / 41