HW - Calculator.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplicationHW
{
    class Calculator
    {
        public static DegreeValue Minus(DegreeValue v1, DegreeValue v2)
        {
            return v1 - v2;
        }
        public static DegreeValue Plus(DegreeValue v1, DegreeValue v2)
        {
            return v1 + v2;
        }
        public static DegreeValue Multiply(DegreeValue v1, int factor)
        {
            return v1 * factor;
        }
        public static DegreeValue Multiply(int factor, DegreeValue v1)
        {
            return v1 * factor;
        }
        public static DegreeValue Divide(DegreeValue v1, int devisor)
        {
            return v1 / devisor;
        }
        public static DegreeValue Flip(DegreeValue v1)
        {
            return new DegreeValue(0, 0, -(v1.Degrees * 3600 + v1.Minutes * 60 + v1.Seconds));
        }
        public static double Sin(DegreeValue v1)
        {
            double rad = Math.PI / 180 * (v1.Degrees + (double)v1.Minutes / 60 + (double)v1.Seconds / 3600);
            return Math.Sin(rad);
        }
        public static double Cos(DegreeValue v1)
        {
            double rad = Math.PI / 180 * (v1.Degrees + (double)v1.Minutes / 60 + (double)v1.Seconds / 3600);
            return Math.Cos(rad);
        }
        public static double Tg(DegreeValue v1)
        {
            if ((v1.ToSeconds() != 90 * 3600) && (v1.ToSeconds() != 270 * 3600))
            {
                double rad = Math.PI / 180 * (v1.Degrees + (double)v1.Minutes / 60 + (double)v1.Seconds / 3600);
                return Math.Tan(rad);
            }
            else if (v1.ToSeconds() == 90 * 3600)
            {
                return double.PositiveInfinity;
            }
            else
            {
                return double.NegativeInfinity;
            }
        }
        public static double Ctg(DegreeValue v1)
        {
            if ((v1.ToSeconds() != 0) && (v1.ToSeconds() != 180 * 3600))
            {
                double rad = Math.PI / 180 * (v1.Degrees + (double)v1.Minutes / 60 + (double)v1.Seconds / 3600);
                return (double)1 / Math.Tan(rad);
            }
            else if (v1.ToSeconds() == 0)
            {
                return double.PositiveInfinity;
            }
            else
            {
                return double.NegativeInfinity;
            }
        }
        public static DegreeValue ArcSin(double sin)
        {
            if (sin >= -1 && sin <= 1)
            {
                int sec = (int)Math.Round(Math.Asin(sin) * 3600 * 180 / Math.PI);
                DegreeValue res = new DegreeValue(0, 0, sec);
                return res;
            }
            else
            {
                return null;
            }
        }
        public static DegreeValue ArcCos(double cos)
        {
            if (cos >= -1 && cos <= 1)
            {
                int sec = (int)Math.Round(Math.Acos(cos) * 3600 * 180 / Math.PI);
                DegreeValue res = new DegreeValue(0, 0, sec);
                return res;
            }
            else
            {
                return null;
            }
        }
        public static DegreeValue ArcTg(double tg)
        {
                int sec = (int)Math.Round(Math.Atan(tg)*3600*180/Math.PI);
                return new DegreeValue(0, 0, sec);
        }
        public static DegreeValue ArcCtg(double ctg)
        {
            if (ctg != double.NegativeInfinity)
            {
                int sec = (int)Math.Round(Math.Atan(1 / ctg) * 3600 * 180 / Math.PI);
                return new DegreeValue(0, 0, sec);
            }
            else
            {
                return new DegreeValue(180);
            }
        }
    }
}