I’m using the Twelve Days of Christmas (and perhaps a few extra days besides) to do something that I should have done a long time ago: collect past series of posts into a single, easy-to-reference post. The following posts formed my series on how the trigonometric form of complex numbers, DeMoivre’s Theorem, and extending the definitions of exponentiation and logarithm to complex numbers.

Part 1: Introduction: using a calculator to find surprising answers for and . See the video below.

Part 2: The trigonometric form of complex numbers.

I'm a Professor of Mathematics and a University Distinguished Teaching Professor at the University of North Texas. For eight years, I was co-director of Teach North Texas, UNT's program for preparing secondary teachers of mathematics and science.
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5 thoughts on “Calculators and Complex Numbers: Index”

Hi

I use online complex number calculator –

https://www.hackmath.net/en/calculator/complex-number?input=1%2B3i&submit=Calculate

for double checking school’s examples and tasks….