Additional Videos for Section 5.5 Solving Trig Equations Using the Double Angle Formulas
https://www.youtube.com/watch?v=7Eo-fuy0f7g
https://www.youtube.com/watch?v=RDt8eYxLZ-Y
https://www.youtube.com/watch?v=rF36a8K_3QM
https://www.youtube.com/watch?v=H4cOz7ubTvk (helps you understand how the domain will change for a double angle)