solving the differential equation y''+y=tan(t) by variation of parameters

We will be solving the differential equation y''+y=tan(t) by using the variation of parameters method. To see how to derive the variation of parameters formula, please see here https://youtu.be/BaK4Mkn1k1Y Check out my differential equation playlists for more lessons and tutorials: https://www.youtube.com/@blackpenredpen/playlists?view=50&sort=dd&shelf_id=5 🍎 Support me on patron https://www.patreon.com/blackpenredpen #differentialequation #math #blackpenredpen