[tex]e^{ix}=cosx + isinx [/tex](adsbygoogle = window.adsbygoogle || []).push({});

I know this can be easily proven using the Taylor series, but I recall seeing a proof which doesn't use the Taylor series. I'm pretty sure it has something to do with derivatives, but the problem is I don't remember how it went and I can't find it anywhere. So if anyone knows it or has any idea of where to start could you let me know? Thanks.

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Proof of complex exponential

Loading...

Similar Threads - Proof complex exponential | Date |
---|---|

B Proof of a limit rule | Dec 19, 2017 |

Complex Analysis proof question (from Markushevich text)) | Jan 2, 2012 |

Complex Proof | Dec 20, 2006 |

Complex Integrable Proof | Dec 20, 2006 |

Need some help with basic complex analysis (no proofs) | Feb 17, 2005 |

**Physics Forums - The Fusion of Science and Community**