NCERT Solutions for Class 12 Maths Chapter 6 – Application of Derivatives
NCERT Solutions for Class 12 Maths Chapter 6 – Application of Derivatives are designed to help students develop a clear understanding of how differentiation is applied in real-world scenarios. At Myclass24, we have put together well-structured, step-by-step solutions that make this chapter approachable for all learners. Whether you are solving problems on maxima and minima, rate of change, or the equation of tangents and normals, our solutions cover every exercise with detailed explanations that go beyond just the final answer.
Find the PDF of NCERT Solutions for Class 12 Maths Chapter 6
The PDF of NCERT Solutions for Class 12 Maths Chapter 6 – Application of Derivatives is available on Myclass24. Students can access all exercise-wise solutions in a clean, printable format. The PDF is structured to match the textbook order, making it easy to follow along while studying. Download and keep it handy during your revision sessions for quick reference before tests and board exams.
Summary of Chapter 6 Applications of Derivatives
Applications of Derivatives-Derivative as rate measurer- Rate of change of quantities, Marginal rate, related rates. Equation of tangent & Normal, Length of a tangent, Normal, Sub-tangent, Subnormal, Angle between two curves, Errors and approximation, Monotonicity - Increasing and decreasing function. Definition of local maxima & minima, Absolute maxima & minima, First order Derivative test, Second order derivative Test, Word problem on Maxima & Minima
| Detail | Information |
| Chapter | Chapter 6 – Application of Derivatives |
| Class | Class 12 Maths |
| Board | CBSE (NCERT) |
| Total Exercises | 5 Exercises + Miscellaneous |
| Topics Covered | Rate of Change, Tangents, Normals, Increasing/Decreasing Functions, Maxima & Minima, Approximations |
| Difficulty Level | Moderate to High |
| Content By | Myclass24 |
About Chapter 6 – Application of Derivatives
Chapter 6 takes the concept of differentiation, which students study in Chapter 5, and shows how it becomes a practical tool. The chapter begins with the idea of the rate of change of quantities — think of how a balloon's volume changes as it is inflated, or how the area of a circle changes as its radius increases. These may sound simple, but the problems in Exercise
Exercise 6.1 push students to set up equations carefully before applying the derivative. The section on tangents and normals
Exercise 6.2 is where geometry meets calculus. Students learn to find the slope of a tangent at any point on a curve using dy/dx, and then determine the equation of the tangent and the perpendicular normal at that point. This part of the chapter is particularly important for board exams because it appears almost every year.
Exercise 6.3 deals with increasing and decreasing functions. Here, the derivative acts as a tool to determine the behaviour of a function over an interval — whether it is going up or coming down. Students need to find critical points, divide the domain into intervals, and test the sign of f'(x) in each interval. It is systematic work, but very rewarding once the logic clicks. The concept of approximations.
Exercise 6.4 uses differentials to estimate values that are otherwise hard to calculate by hand. For instance, finding the approximate value of the square root of 25.1 becomes straightforward once you know how to use the linear approximation formula.
Exercise 6.5 and the Miscellaneous Exercise focus on maxima and minima — perhaps the most celebrated application of derivatives. Students use the first derivative test and the second derivative test to locate local maximum and minimum points. Real-life problems involving optimising area, volume, cost, and profit make this section genuinely engaging.
At Myclass24, our solutions for Chapter 6 are written keeping both the CBSE pattern and the student's conceptual growth in mind. Every solution includes the reasoning behind each step so students are not just copying answers but actually understanding why a particular approach works.
Why Study Chapter 6 from Myclass24?
At Myclass24, every solution for Chapter 6 is crafted keeping the CBSE exam pattern in mind. The explanations are written in plain language, the steps are numbered clearly, and important formulas are highlighted where needed. Students preparing for board exams, or anyone who wants to genuinely understand Application of Derivatives, will find Myclass24 solutions both reliable and thorough.
NCERT Solutions for Class 12 Maths Chapter 5 – Continuity and Differentiability FAQs
Continuity refers to the smoothness of a function at a given point without any breaks, jumps, or gaps. A function is said to be continuous at a point if the left-hand limit, right-hand limit, and the value of the function at that point are all equal. In this chapter, students learn to verify continuity using these conditions. NCERT exercises often include piecewise functions where continuity must be checked at specific points. Understanding continuity is important because it forms the foundation for differentiation and many advanced topics in calculus. Careful evaluation of limits helps students identify whether a function is continuous and solve examination questions accurately.
Differentiability refers to the existence of a derivative at a particular point. A function is differentiable if it has a well-defined slope or rate of change at that point. Although every differentiable function is continuous, the reverse is not always true. Some functions may be continuous but not differentiable due to sharp corners, cusps, or vertical tangents. NCERT exercises frequently test this relationship between continuity and differentiability. Understanding the distinction helps students solve conceptual questions and prove mathematical statements correctly. A strong grasp of both concepts is essential because they form the basis for applications of derivatives studied in later chapters.
Finding derivatives of inverse trigonometric functions is one of the most important topics in this chapter. Students learn standard derivative formulas for functions such as sin⁻¹x, cos⁻¹x, tan⁻¹x, and others. NCERT questions often involve direct differentiation as well as applications of these formulas within composite functions. The key to solving such problems is recognising the appropriate formula and applying differentiation rules carefully. Students should also pay attention to domain restrictions where necessary. Regular practice of inverse trigonometric derivatives improves speed and accuracy, making it easier to solve higher-level calculus problems that appear in board examinations and competitive tests.
Exponential and logarithmic functions are important parts of this chapter because they frequently appear in differentiation problems. Students learn how to differentiate functions involving exponential expressions and logarithms using standard derivative formulas. NCERT exercises include both straightforward and application-based questions that require careful algebraic manipulation. Understanding these derivatives is essential because they are widely used in higher mathematics, science, and economics. Students should focus on recognising function types and applying the correct differentiation rule. Consistent practice helps build confidence and ensures that even complex expressions involving logarithmic and exponential functions can be solved efficiently.
Many students lose marks by confusing continuity with differentiability or by applying derivative formulas incorrectly. Another common mistake is failing to verify left-hand and right-hand limits while checking continuity. Errors in algebraic simplification and careless substitution also lead to incorrect answers. In differentiation, students sometimes forget to apply the chain rule when dealing with composite functions. NCERT exercises are designed to strengthen conceptual understanding and reduce such mistakes. Students should practise step-by-step solutions and review important formulas regularly. Developing a clear understanding of definitions and procedures helps improve accuracy and performance in both board examinations and competitive assessments.