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February 21st, 2012, 03:50 AM   #1
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power series

show that e^i?=cos???+i sin?? ?,
using the power series for e^x, cos?x and sin?x
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February 21st, 2012, 04:07 AM   #2
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I think you intended Euler's formula:
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February 21st, 2012, 07:19 AM   #3
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Re: power series

We have to prove:


Using the Maclaurin series:





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