# Cosine

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Revision as of 14:04, 6 March 2016 by Bookofproofs (talk | contribs)

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).