Polar form of complex numbers - How to calculate?

Please, subscribe. Then you can see when I'm doing a live stream.
Here, I present some visualisation and calculation for the polar form of a complex numbers. This is important if you want to solve equations with complex numbers. I apologise for my pronunciation. The focus is on the mathematics and not my English skills :)
(This exercise fits to lectures for students in their first year of study: Mathematics for physicists, Mathematics for the natural science, Mathematics for engineers, Linear algebra and so on)

[@mauriceb]

Very interesting video, thanks for your work on it. This is one of the topics in mathematics, which is quite more popular as other topics on your channel. So for me a good starting point to enter the big world of mathematics on your channel. I think the case analysis at the end (with the angle) was very helpful, thanks. I look forward to future videos ;)

[@brightsideofmaths]

Thank you very much :)

[@PunmasterSTP]

Polar form? More like "Perfect storm"...of math education on UA-cam! Thanks so much for making such high-quality videos on so many topics within math, and sharing them for free.

[@MonalisaRamona85]

Hast es sehr gut erklärt :)
Herzlichen Dank :)
Like #3 LEUTE IHR SOLLT MEHR LIKEN !!!!

[@amlong6983]

Danke

[@jameyatesmauriat6116]

Thank you for explanation. At 7:50 can I know why you typed -pi/2 before pi/2?

[@brightsideofmaths]

It's an interval :)