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>
    window.onload = function ()
    {
        var data_sin = [];
        var data_cos = [];
        var 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>

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