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title: Eulers Formula
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## Eulers Formula

Eulers Formula is a mathematical identity which states that (for any value of x):
 e^(ix)=cosx+isinx
 
This is of interest because of the following case: 
When x=pi, Euler's Formula gives the beautiful identity invovling pi, e, and i.

 e^(ipi)+1=0, 

A famous joke for mathematicians is "How many mathematicians does it take to change a light bulb?" and answers "-e^(ipi)" 
Can you tell what the answer is?
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#### More Information:
Read more about Eulers Formula [here](http://mathworld.wolfram.com/EulerFormula.html)
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