# Difference between revisions of "Cosine"

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− | + | Geometrically, the cosine is a projection of the complex number exp(−ix) to the real axis. The behavior of the cosine function can be studied in the following interactive figure, where you can drag the point x and observe the behaviour of the complex number exp(−ix) and the value of cosine(x). | |

− | + | <jsxgraph box="boxR" width="500" height="500"> | |

var brd1 = JXG.JSXGraph.initBoard('boxR', {boundingbox: [-10, 1.5, 10, -1.5], axis:true}); | var brd1 = JXG.JSXGraph.initBoard('boxR', {boundingbox: [-10, 1.5, 10, -1.5], axis:true}); | ||

var xr = brd1.create('line',[[-9,0],[9,0]],{visible:false}); | var xr = brd1.create('line',[[-9,0],[9,0]],{visible:false}); |

## Revision as of 15:00, 6 March 2016

Geometrically, the cosine is a projection of the complex number exp(−ix) to the real axis. The behavior of the cosine function can be studied in the following interactive figure, where you can drag the point x and observe the behaviour of the complex number exp(−ix) and the value of cosine(x).