Calculate bearing between two locations (lat, long)

Question

I\'m trying to develop my own augmented reality engine.

Searching on internet, I\'ve found this useful tutorial. Reading it I see that the important thing is bearing

Answer 1

/* Kirit vaghela answer has been modified.. Math.sin gives the radian value so to get degree value we need to pass Math.toRadians(value) inside Math.sin() or Math.cos() */

    double lat1 = 39.099912;
    double lat2 = 38.627089;
    double lng1 = -94.581213;
    double lng2 = -90.200203;

    double dLon = (lng2-lng1);
    double x = Math.sin(Math.toRadians(dLon)) * Math.cos(Math.toRadians(lat2));
    double y = Math.cos(Math.toRadians(lat1))*Math.sin(Math.toRadians(lat2)) - Math.sin(Math.toRadians(lat1))*Math.cos(Math.toRadians(lat2))*Math.cos(Math.toRadians(dLon));
    double bearing = Math.toDegrees((Math.atan2(x, y)));
    System.out.println("BearingAngle : "+bearing);