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

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.