18A.2 Multiplikation am Einheitskreis geometrisch, Länge, komplex Konjugiertes

Whole-channel inclusion: Jörn Loviscach is an honest teaching channel (title sample + 3 transcripts read: The sampled videos are segments of structured programming/math lectures, matching the channel's teaching focus.); this title passed a strict title check (sonnet) after a labelling pass.