Class 11 Chapter 1 Sets

https://www.youtube.com/playlist?list=PLPScH_wS88iv6Z_V2UFR4-KrXx8J7O3ey

Class 11 Chapter 3 Trigonometric Functions

https://www.youtube.com/playlist?list=PLPScH_wS88isdMX2Ga0PwC7GkE3ZRf-Dh

Class 11 Chapter 7 Permutations and Combinations

https://www.youtube.com/playlist?list=PLPScH_wS88iscQqbSKODruleZdgSp3IDS

Class 11 Chapter 13 Limits and Derivatives

https://www.youtube.com/playlist?list=PLPScH_wS88isreJH3sQ_bbaHZ2RidfVpf