Use the fact that sin(x) =Im(e^ix) to calculate a simpler derivation of this result.

Could someone explain how to solve this?

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- Jan 18th 2009, 11:41 AMHarisSeries expansion
Use the fact that sin(x) =Im(e^ix) to calculate a simpler derivation of this result.

Could someone explain how to solve this? - Jan 18th 2009, 11:55 AMo_O
- Jan 18th 2009, 12:00 PMHaris
Sorry, the series expansion of .

- Jan 19th 2009, 05:10 AMMoo
Hello,

As mentioned :

Now use the power series expansion of the exponential :

But

So the series is now :