CBSE, the Central Board of Secondary Education, is the national-level educational board in India. In recent years, CBSE has made significant changes to its curriculum to ensure that students are not burdened with an extensive syllabus. The focus of CBSE is to provide quality education rather than quantity. Especially in the aftermath of the COVID-19 pandemic, there is a strong emphasis on streamlining the syllabus to cover essential knowledge for students. Consequently, CBSE has removed several topics and even chapters from its syllabus, impacting the content of NCERT textbooks.
In this article, we will provide you with detailed information on the topics and chapters that have been deleted from the CBSE Class 11 Maths syllabus. This will help you stay updated with the latest changes and have a better understanding of the revised Mathematics syllabus.
For a comprehensive understanding, check the updated CBSE Class 11 Maths syllabus for the academic year 2023-24.
CBSE Class 11 Mathematics Deleted Syllabus 2023-2024
Previously, the Class 11 Maths CBSE syllabus consisted of six units, which have now been reduced to five. Within these units, certain chapters have been completely removed. We understand that comprehending the dropped topics can be challenging, so we have provided a table below that outlines the units, chapters, and deleted topics for complete transparency.
| Chapter No. | Chapter Name | Deleted Topics |
| Unit I: Sets and Functions | ||
| 1 | Sets | Power set |
| 2 | Relations & Functions | No Change |
| 3 | Trigonometric Functions | General solution of trigonometric equations of the type siny = sina, cosy = cosa and tany = tana. |
| Unit II: Algebra | ||
| 4 | Principle of Mathematical Induction | Complete Chapter |
| 5 | Complex Numbers and Quadratic Equations | Polar representation of complex numbers.Statement of Fundamental Theorem of Algebra, solution of quadratic equations (with real coefficients) in the complex number system. Square root of a complex number. |
| 6 | Linear Inequalities | Graphical solution of linear inequalities in two variables.Graphical method of finding a solution of system of linear inequalities in two variables. |
| 7 | Permutations and Combinations | No Change |
| 8 | Binomial Theorem | General and middle term in binomial expansion |
| 9 | Sequence and Series | Arithmetic Progression, Sum to n terms of Special Series |
| Unit-III: Coordinate Geometry | ||
| 10 | Straight Lines | Intercept normal form. General equation of a line.Equation of family of lines passing through the point of intersection of two lines. |
| 11 | Conic Sections | No Change |
| 12 | Introduction to Three-dimensional Geometry | Section Formula |
| Unit-IV: Calculus | ||
| 13 | Limits and Derivatives | No Change |
| Unit-V: Mathematical Reasoning | ||
| 14 | Mathematical Reasoning | Complete Chapter |
| Unit-VI: Statistics and Probability | ||
| 15 | Statistics | Analysis of frequency distributions with equal means but different variances. |
| 16 | Probability | Random experiments; outcomes, sample spaces (set representation). |
CBSE Class 11 Mathematics List of Rationalised Content 2023-24
With the change in the CBSE syllabus, NCERT also follows the update and introduces the same in its books. This ensure students don’t grab unnecessary knowledge. Below are the topics, examples, and questions that have been removed from the 2023-24 NCERT Class 11 Maths textbook.
| Chapter | Deleted/Dropped Topics |
| Chapter 1: Sets | 1.7 Power Set, Exercise 1.3 Ques. 5 1.12 Practical Problems on Union and Intersection of Two Sets Exercise 1.6 Examples 31–34 and Ques. 6–7 (Miscellaneous Exercise) Ques. 13–16 (Miscellaneous Exercise), Last Point in the Summary on the Page Last Point in the Summary |
| Chapter 3: Trigonometric Functions | 3.5 Trigonometric Equations (up to Exercise 3.4) Last five points in the Summary 3.6 Proofs and Simple Applications of Sine and Cosine Formulae |
| Chapter 4: Principle of Mathematical Induction | Full Chapter |
| Chapter 5: Complex Number | 5.5.1 Polar Representation of a Complex Number 5.6 Quadratic Equation Example 11 and Exercise 5.3 Examples 13, 15, 16 Ques. 5–8, 9 and 13 (Miscellaneous Exercise) Last three points in the Summary 5.7 Square-root of a Complex Number |
| Chapter 6: Linear Inequalities | 6.4 Graphical Solution of Linear Inequalities in Two Variables 6.5 Solution of System of Linear Inequalities in Two Variables Last three points in the Summary |
| Chapter 8: Binomial Theorem | 8.3 General Middle Terms Example 17 and Ques. 1–3, and 8 (Miscellaneous Exercise) Last two points in the Summary |
| Chapter 9: Sequences and Series | 9.4 Arithmetic Progression (A.P.) (up to Exercise 9.2) 9.7 Sum to n terms of Special Series Examples 21, 22 and 24 Ques. 1–6, 12, 15, 16, 20, 23–26 (Miscellaneous Exercise) Point 3 and 4 in the Summary |
| Chapter 10: Straight Lines | 10.2.4 Collinearity of Three Points (Examples 4–5 and Ques. 8, 13–14 in Exercise 10.1) 10.3.6 Normal Forms Ques. 8 in Exercise 10.2 10.4 General Equation of a Line Ques. 3 in Exercise 10.3 Ques. 2 (Miscellaneous Exercise) Fourth Last Point in the Summary 10.6 Equation of Family of Lines Passing Through the Points of Intersection of Two Lines 10.7 Shifting of Origin |
| Chapter 11: Conic Sections | 11.5.2 Special Cases of an Ellipse |
| Chapter 12: Introduction to Three Dimensional Geometry | 12.5 Section Formula Exercise 12.3 Ques. 4 and 5 (Miscellaneous Exercise), Last Three Points in the Summary |
| Chapter 14: Mathematical Reasoning | Full Chapter |
| Chapter 15: Statistics | 15.6 Analysis of Frequency Distribution Ques. 6 (Miscellaneous Exercise) and last point in the Summary) |
| Chapter 16: Probability | 16.1 Introduction 16.2 Random Experiment First Two Points in the Summary |