geospatial - Shorten this code that determines distance between two lat/longs in C#? -

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public static double distance(latlong from, latlong to) {     double lat1 = from.latitude * (math.pi / 180.0);     double lat2 = to.latitude * (math.pi / 180.0);      return         math.acos((math.sin(lat1) * math.sin(lat2)) +         (math.cos(lat1) * math.cos(lat2) *         math.cos((math.pi / 180.0) * (to.longitude - from.longitude)))) * 3958.760; }

can shorten code stretch? i'm wondering ...

that's standard spherical law of cosines formula. won't simpler that. @ best, clean code little:

public static double distance(latlong from, latlong to) {     double deg = math.pi / 180.0;       // 1 degree in radians     double lat1 = from.latitude * deg;     double lat2 = to.latitude * deg;     double dlng = (to.longitude - from.longitude) * deg;     double r = 3958.760;      return math.acos(math.sin(lat1) * math.sin(lat2) +                      math.cos(lat1) * math.cos(lat2) * math.cos(dlng)) * r; }

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