I'm permanently setting a GameObjects positions in Awake() but it keeps moving if I use the Cos function in calculating its position, anyone know why?

     GameObject prefab = Resources.Load("char") as GameObject;
     for (int i = 0; i < 20; i+=2)
     {
         GameObject go = Instantiate(prefab) as GameObject;

         var x = radius * Mathf.Cos(deg[i] * Mathf.Deg2Rad);
         var y = radius * Mathf.Sin(deg[i] * Mathf.Deg2Rad);
         go.transform.position = new Vector3(x, y,0);
         chars[i] = go;
     }