Nodejs Utililty Methods Degree to Radian Convert

Number.prototype.toRad = function() { 
  return this * Math.PI / 180; 
};
Number.prototype.toDeg = function() { 
  return this * 180 / Math.PI; 
};
global.getPointAtDistance = function(lat, lon, brng, dist) {
  dist = dist / 6371000;
  brng = brng.toRad();
...

Number.prototype.toRad = function() {
    return this * Math.PI / 180;
};

Number.prototype.toRad = function() {
  return (this / 180) * Math.PI;
};

Number.prototype.toRad = function() {  
  return this * Math.PI / 180;

Number.prototype.toRadians = function() {
    return (this / 360) * 2 * Math.PI;

Number.prototype.toRadians = function() { 
  return this * Math.PI / 180; 

function getHaversineDistance(point1, point2){  
  var R = 6372.8;
  var dLat = (point2.lat - point1.lat).toRadians();
    var dLon = (point2.lon - point1.lon).toRadians();
    var lat1 = point1.lat.toRadians();
    var lat2 = point2.lat.toRadians();
  var a = Math.sin(dLat/2) * Math.sin(dLat/2) + Math.sin(dLon/2) * Math.sin(dLon/2) * Math.cos(lat1) * Math.cos(lat2)
  var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a))
  return = R * c;   
...

'use strict'
Number.prototype.toRadians = function() {
  return this * Math.PI / 180;

Number.prototype.toRadians = function() { 
    return (this.valueOf() * Math.PI) / 180; 

function toReadableFileSize(bytes) {
  var i = 0;
  var byteUnits = [' bytes' , ' kB', ' MB', ' GB', ' TB', ' PB', ' EB', ' ZB', ' YB'];
  while (bytes > 1024) {
    bytes = bytes / 1024;
    i++;
  if (i > 0)
    return bytes.toFixed(1) + byteUnits[i];
...