what ever I do I get totally wrong resault

http://www.mathsisfun.com/geometry/unit-circle.html

- cos 0.5f should be 60°
- cos 0 should be 90°

but they aren’t:

```
Debug.Log(Mathf.Cos(0.5f) ); // 50.28178
Debug.Log(Mathf.Cos(0f) ); // 1
Debug.Log(Mathf.Cos(0.5f) * Mathf.Deg2Rad); // 0.01745329
Debug.Log(Mathf.Cos(0.5f) * Mathf.Rad2Deg); // 57.29578
```

so what am I doing wrong?