# Finding cube root of an imaginary number

**URL:** <https://forum.kirupa.com/t/finding-cube-root-of-an-imaginary-number/221851>\
**Category:** random\
**Created:** [April 8, 2007, 4:12pm UTC](https://forum.kirupa.com/t/finding-cube-root-of-an-imaginary-number/221851 "2007-04-08T16:12:44Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![kdd](https://avatars.discourse-cdn.com/v4/letter/k/ecb155/32.png) [@kdd](https://forum.kirupa.com/u/kdd)\
**Post date:** [April 8, 2007, 4:12pm UTC](https://forum.kirupa.com/t/finding-cube-root-of-an-imaginary-number/221851/1 "2007-04-08T16:12:44Z")

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I want to find the cube root of an imaginary number. The formula I can use is De Moivre’s formula. I’ve no idea how to do it. Can anyone please explain it to me?

For example: (5.7037 + 2.8868 i )^1/3 = 1.8333 + .28868 i.

The formula is here: [http://www.answers.com/topic/de-moivre-s-identity](http://www.answers.com/topic/de-moivre-s-identity)

Thanks. :)[FONT=TimesNewRomanPSMT][SIZE=1][COLOR=#0000ff]  
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