php.js/cos.js

Use phpjs functions as required.

module.exports=function(){ return cos.apply(exports,arguments) };

function cos(arg) {
  //  discuss at: http://phpjs.org/functions/cos/
  // original by: Onno Marsman
  //   example 1: cos(8723321.4);
  //   returns 1: -0.18127180117605912

  return Math.cos(arg);
}