Quantum Computing, Qiskit, General U3 Gate, Controlled U3 Gate, Tutorial.
How to find correct angle values for Parametrized Quantum U3 gates and Controlled U3 gates using Qiskit Beginner-friendly tutorial encouraging baby-steps in Quantum Computing using Qiskit Source: Wikipedia. Bloch sphere representing different basis (x, y, z), states (0, 1, 𝜓) and relevant angle