NCERT dropped some topics and chapters from the textbooks. You can check the list of rationalised content for NCERT Class 12. Also Check: The NCERT Class 12 Maths book is considered the best ...

Among other changes, the Grade 12 Maths syllabus was also modified by scrapping Chapters 1 to 7 from the textbook and simplifying the introduction for Chapters 2 to 6.