public static void Main()
float angle = (float)(Math.PI / 180) * 90f;
float nw = Math.Abs(w * (float)Math.Cos(angle)) + Math.Abs(h * (float)Math.Sin(angle));
float nh = Math.Abs(w * (float)Math.Sin(angle)) + Math.Abs(h * (float)Math.Cos(angle));
Console.WriteLine((int)nw + " by " + (int)nh + " at angle " + (angle / (Math.PI / 180)));