Trigonometry curves (sin, cos and tan)

This goes in the documents header:

<script src="RGraph.common.core.js"></script>
<script src="RGraph.drawing.xaxis.js"></script>
<script src="RGraph.scteter.js"></script>

Put this where you want the chart to show up:

<canvas id="cvs" width="1000" height="200">
    [No canvas support]
</canvas>

This is the code that generates the chart:

<script>
    var data_sin = [],
        data_cos = [],
        data_tan = [];

    for (var i=-360; i<360; i+=1) {
        data_sin.push([i, Math.sin(i / (180 / Math.PI))]);
        data_cos.push([i, Math.cos(i / (180 / Math.PI))]);
        
        var tan_value = Math.tan(i / (180 / Math.PI));
        data_tan.push([i, (tan_value < 1 && tan_value > -1) ? tan_value : null]);
    }

    var xaxis = new RGraph.Drawing.XAxis({
        id: 'cvs',
        y:100,
        options: {
            scaleZerostart: false,
            yaxispos: 'center',
            numlabels: 4,
            numticks: 16,
            max: 360,
            textAccessible: true
        }
    }).draw()

    var scatter = new RGraph.Scatter({
        id: 'cvs',
        data: [data_sin, data_cos, data_tan],
        options: {
            ymax: 1,
            xmax: 360,
            scaleDecimals: 1,
            gutterLeft: 500,
            line: true,
            lineLinewidth: 3,
            tickmarks: null,
            xaxispos: 'center',
            xaxis: false,
            backgroundGrid: false,
            outofbounds: false,
            textAccessible: true
        }
    }).trace2();
</script>