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Find Distance by Latitude and Longitude

I was just stuck in a weird calculation.

I am trying to find the distance in latitude and longitude using this formula mentioned on this site.

http://www.movable-type.co.uk/scripts/latlong.html

anything is there when I do it with a calculator, but when I started doing it programmatically, the result is a difference.

here is my piece of code

lat = Convert.ToDouble( (s3[a]));
                longt =Convert.ToDouble( (s4[a]));
                Avg_lat = pc._Latitude - lat;
                Avg_longt = pc._Longitude - longt;



            a_hold =( Math.Sin(Avg_lat / 2) * Math.Sin(Avg_lat / 2) )+ (Math.Cos(pc._Latitude) * Math.Cos(lat)) * (Math.Sin(Avg_longt / 2) * Math.Sin(Avg_longt / 2));
            c_hold = 2 * Math.Atan2(Math.Sqrt(a_hold), Math.Sqrt(1 - a_hold));
           // c_hold = (c_hold * 180) / 3.12;
            distance = 6371 * c_hold;

the problem is the mathematical function here calculates things in radians, I want this to the power. therefore, I just found a formula for converting radium to degrees, but this formula incorrectly converts the calculations.

I am just confused what to do bcoz, there is no other way to convert radians to degrees.

Any suggestion or IDea would be possible. Quick Play Search

thank

+3
3

? radians-to-degrees (180.0 / Math.PI), - (Math.PI / 180.0).

Math.Sin Math.Cos. Math.Atan2, , -, , , ( ).

+3

Java , LinkedIn datafu.

+1

, .

= * PI/180

0

Source: https://habr.com/ru/post/1774703/

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