Answer:
12/37
Explanation:
Given right triangle ABC with sides AB=37, BC=12, and CA=35, you want the cosine of angle B.
Cosine
The cosine of an angle in a right triangle is ...
Cos = Adjacent/Hypotenuse
The leg adjacent to angle B is BC=12. The hypotenuse is AB=37.
Using these values, the cosine of B is ...
cos(B) = BC/BA
cos(B) = 12/37