Plotting polar equations and converting back and forth between rectilinear Cartesian and polar equations.
Good video on Completing the Square by @PreMath
https://www.youtube.com/watch?v=0IFPixtQpYM
Learn @Desmos
https://www.youtube.com/watch?v=K2mSm9r_T-k&list=PLfM6zMGnbgOGLZc-_Yj3QVK3Vz_L4Cw59
Graphing Roses by @MichelvanBiezen
https://www.youtube.com/watch?v=y2COhd--uUU
The Art of Polar Graphs by Will Brown (@real_willbrown )
https://www.youtube.com/watch?v=rh-X29nBfGI
International A level, Intl A Level, IAL, Edexcel, Pearson exam board, CIE, Cambridge exam board, P3, P2, Year 10, Class 11