Difference between revisions of "Power Series for sine and cosine"

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<source lang="javascript">
 
<source lang="javascript">
board1 = JXG.JSXGraph.initBoard('jxgbox1', {originX: 300, originY: 150, unitX: 50, unitY: 50});
+
board1 = JXG.JSXGraph.initBoard('jxgbox1', {axis:true, originX: 300, originY: 150, unitX: 50, unitY: 50});
 
board1.suspendUpdate();
 
board1.suspendUpdate();
board1.createElement('axis', [[0,0], [1,0]], {});
 
board1.createElement('axis', [[0,0], [0,1]], {});
 
 
board1.createElement('functiongraph', [function(t){ return Math.sin(t); },-10, 10],{strokeColor: "#cccccc"});
 
board1.createElement('functiongraph', [function(t){ return Math.sin(t); },-10, 10],{strokeColor: "#cccccc"});
 
var s = board1.createElement('slider', [[0.75,-2.5],[5.75,-2.5],[0,0,10]], {name:'S'});
 
var s = board1.createElement('slider', [[0.75,-2.5],[5.75,-2.5],[0,0,10]], {name:'S'});
Line 32: Line 30:
 
<script language="JavaScript">
 
<script language="JavaScript">
 
// Board
 
// Board
board1 = JXG.JSXGraph.initBoard('jxgbox1', {originX: 300, originY: 150, unitX: 50, unitY: 50});
+
board1 = JXG.JSXGraph.initBoard('jxgbox1', {axis:true, originX: 300, originY: 150, unitX: 50, unitY: 50});
 
board1.suspendUpdate();
 
board1.suspendUpdate();
// Axes and Properties
 
board1.createElement('axis', [[0,0], [1,0]], {});
 
board1.createElement('axis', [[0,0], [0,1]], {});
 
 
board1.createElement('functiongraph', [function(t){ return Math.sin(t); },-10, 10],{strokeColor: "#cccccc"});
 
board1.createElement('functiongraph', [function(t){ return Math.sin(t); },-10, 10],{strokeColor: "#cccccc"});
 
var s = board1.createElement('slider', [[0.75,-2.5],[5.75,-2.5],[0,0,10]], {name:'S'});
 
var s = board1.createElement('slider', [[0.75,-2.5],[5.75,-2.5],[0,0,10]], {name:'S'});

Revision as of 17:11, 18 March 2009

Power Series for Sine

<link rel="stylesheet" type="text/css" href="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraph.css" />
<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/prototype.js"></script>
<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraphcore.js"></script>
<div id="jxgbox1" class="jxgbox" style="width:600px; height:600px;"></div>
board1 = JXG.JSXGraph.initBoard('jxgbox1', {axis:true, originX: 300, originY: 150, unitX: 50, unitY: 50});
board1.suspendUpdate();
board1.createElement('functiongraph', [function(t){ return Math.sin(t); },-10, 10],{strokeColor: "#cccccc"});
var s = board1.createElement('slider', [[0.75,-2.5],[5.75,-2.5],[0,0,10]], {name:'S'});
board1.createElement('functiongraph', [
  function(t) {
    var val = 0;
    for(var i = 0; i < Math.floor(s.X()) + 1; i++) {
      val = val + Math.pow(-1, i) * Math.pow(t, 2 * i + 1) / board1.factorial(2*i+1);
    }
    return val;
  }, -10, 10], {strokeColor: "#bb0000"});
board1.unsuspendUpdate();

Power Series for Cosine

board2 = JXG.JSXGraph.initBoard('jxgbox2', {originX: 300, originY: 150, unitX: 50, unitY: 50});
board2.suspendUpdate();
board2.createElement('axis', [[0,0], [1,0]], {});
board2.createElement('axis', [[0,0], [0,1]], {});
board2.createElement('functiongraph', [function(t){ return Math.cos(t); }, -10, 10],{strokeColor: "#cccccc"});
var s2 = board2.createElement('slider', [[0.75,-2.5],[5.75,-2.5],[0,0,10]], {name:'T'});
board2.createElement('functiongraph', [
  function(t) {
    var val = 0;
    for(var i = 0; i < Math.floor(s2.X()) + 1; i++) {
      val = val + Math.pow(-1, i) * Math.pow(t, 2 * i) / board2.factorial(2*i);
    }
    return val;
  }, -10, 10],{strokeColor: "#009900"});						
board2.unsuspendUpdate();

References