shows how unit circle represents two different q-bits. Where α = cos θ

Representing Position and Orientation

Chapter 3: Hamiltonian Mechanics

10.1: The Unit Circle- Cosine and Sine - Mathematics LibreTexts

Frontiers The Qubit Fidelity Under Different Error Mechanisms Based on Error Correction Threshold

Unit circle (video), Trigonometry

TIL that Sine and Cosine are merely 2D orthogonal projections of the 3D unit helix. This just blew my mind : r/todayilearned

What is Trigonometry - Math Lessons

How to Use the Unit Circle in Trigonometry