var signal1 = (function() {

    var ka = 1;
    var m = [];
    var fn = 50;
    var fm = 500;
    var fs = 1000;
    var t = 1;
    var cos = Math.cos;
    var pi = Math.PI;
    var za = [];
    var sin = Math.sin;
    for(t;t<fn*t;t++) {
        m.push(Math.sin(2*pi*fm/fs*t));
        za.push((ka*m[t]+1)*cos(2*pi*fm/fs*t));
    }

    return za;
})

var signal1 = signal1();

module.exports = {
    signal1
}