Simple Harmonic Motion (SHM) Proof From the Differential Equation

This is my playlist on SHM (Simple Harmonic Motion):    • SHM Simple Harmonic Motion   You might also find my playlist on high level school 'Calculus' helpful, especially for students in their final year of High School who are in the highest Math course:    • Calculus Specialist Maths / NSW Extension   This is the proof that I went through with my wonderful year 12 class on Simple Harmonic Motion (SHM). This is the lengthy proof starting with the second order Differential Equation.