Dave Horner's Website - Yet another perspective on things...
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"Veni. Vidi. Codi" - "I came. I saw. I coded."
- Apple Computer WWDC 2006
$$\cos x = \sum\limits_{n = 0}^\infty {\frac{{\left( { - 1} \right)^n x^{2n} }}{{\left( {2n} \right)!}}}$$