physics.util.js

// very small utility library for doing physics calculations in a js console
// designed mostly for my physics homework

(function () {
    window.Cos = function (x) { // degree cosine
        return Math.cos(x * 0.01745329251);
    };
    window.Sin = function (x) { // degree sine
        return Math.sin(x * 0.01745329251);
    };
    window.Tan = function (x) { // degree tangent
        return Math.tan(x * 0.01745329251);
    };
    window.g = 10; // positive gravity on earth
    window.rnd = function (x) {
        return Number.parseFloat(x).toPrecision(3);
    };
    window.setMu = function (ms, mk) {
        window.Ms = ms;
        window.Mk = mk;
    };
    window.gsint = function() { // shorthand for g*sin(theta) 
        return Sin(theta)*g
    };
    window.gcost = function() { // shorthand for g*cos(theta)
        return Cos(theta)*g
    };
    window.theta = 0;
})();

physics.util.min.js

window.Cos=function(n){return Math.cos(.01745329251*n)},window.Sin=function(n){return Math.sin(.01745329251*n)},window.Tan=function(n){return Math.tan(.01745329251*n)},window.g=10,window.rnd=function(n){return Number.parseFloat(n).toPrecision(3)},window.setMu=function(n,t){window.Ms=n,window.Mk=t},window.gsint=function(){return Sin(theta)*g},window.gcost=function(){return Cos(theta)*g},window.theta=0;