A Conversation for The Euler Equation
Other Deriviation
e to the x Started conversation May 7, 2001
Weird.
I learned a different way to derive this formula. How I learned it was by taking the series expansion of e^x and replacing all x's with ix's. Each even term has i to an even power, so it becomes a real number, and all odd terms become imaginary. You can then seperate this series into real and imaginary parts, and it turns out that the real part is the series expansion of cos(x) and the imaginary part is the series expansion of sin(x).
Other Deriviation
Joe aka Arnia, Muse, Keeper, MathEd, Guru and Zen Cook (business is booming) Posted Jul 15, 2001
*grins*
In maths, there is usually more than one way to do something 
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Other Deriviation
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