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From: "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com>
Newsgroups: sci.math
Subject: Re: Question to Euler.
Date: Mon, 26 May 2025 16:14:55 -0700
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On 5/26/2025 4:12 PM, Chris M. Thomasson wrote:
> On 5/26/2025 1:56 PM, Python wrote:
>> Le 26/05/2025 à 22:30, Richard Hachel a écrit :
>>> Z=r(cosθ+i.sinθ), I understand.
>>
>> Are you sure of that? I doubt it.
> [...]
> 
> I wonder if he knows that cos tends to go with x and sin tends to go 
> with y wrt a circle and/or ellipse when the angle goes from 0...pi2?
> 
> fwiw, an ellipse radii is generally two floating points, x and y. When x 
> is equal to y, its a circle. For some reason, I think of an ellipse as a 
> circle rotated in 3d space. ;^) Try not to flame me too bad? ;^o

Many circles, well its all circles, but in a 3d view:

https://skfb.ly/6RozT

Or this one, way more verts, but still is usable:

https://skfb.ly/pxoIA