I am supposed to derive [itex]4\,\arctan \left( 1/5 \right) -\arctan \left( {\frac {1}{239}}(adsbygoogle = window.adsbygoogle || []).push({});

\right) [/itex] from the complex product of [itex]\left( 1+i \right) \left( 5-i \right) ^{4}[/itex] I do see how the argument of product of the complex expression is equal to pi/4 - 4 arctan(1/5) but I am totally lost. SO how am I supposed to approach this? Thanks heaps in advance.

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

Join Physics Forums Today!

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

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

# Deriving inverse tans from complex product?

Loading...

Similar Threads - Deriving inverse tans | Date |
---|---|

A Inverse Laplace transform of a piecewise defined function | Feb 17, 2017 |

I Derivative of Inverse Secant | Oct 16, 2016 |

Finding the derivative on the inverse of a function | Aug 23, 2013 |

Confused about derivatives of inverse functions | Aug 2, 2012 |

Derivative inverse function | Jun 21, 2011 |

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