Im trying to get the ratio of a hypotenuse and an adjacent side of a angle in a right triangle. Radians and degrees is all i can get from Mathf.Cos().

No, you have to provide an angle (in radians, not degrees) to Mathf.Cos, but what it gives you back *is* the (dimensionless) ratio you’re after.

If you wanted to go the other way, to get the angle, you would use Mathf.ACos (which again, returns radians, not degrees).