Class 12 Maths: Application of Derivatives Basics

Answer key included

This worksheet covers fundamental concepts of Application of Derivatives, including increasing/decreasing functions, tangents and normals, and rates of change.

Class 12CBSEMathematicseasy

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Class 12 · Mathematics
Name: ____________
  1. Q1.The slope of the tangent to the curve y = f(x) at a point (x₀, y₀) is given by:
    • A.f(x₀)
    • B.f'(x₀)
    • C.y₀
    • D.dy/dx
  2. Q2.If a function f(x) is strictly increasing on an interval (a, b), then for all x ∈ (a, b), its derivative f'(x) must be:
    • A.f'(x) < 0
    • B.f'(x) = 0
    • C.f'(x) > 0
    • D.f'(x) ≤ 0
  3. Q3.The rate of change of the area of a circle with respect to its radius r, when r = 5 cm, is:
    • A.5π cm²/cm
    • B.10π cm²/cm
    • C.25π cm²/cm
    • D.2π cm²/cm
  4. Q4.If the tangent to the curve y = f(x) at a point is parallel to the x-axis, then at that point, which of the following is true?
    • A.dy/dx is undefined
    • B.dy/dx = 1
    • C.dy/dx = 0
    • D.dy/dx > 0

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What's inside this workbook

This Class 12 Mathematics Practice contains 10 questions across 2 printable pages and includes a full answer key at easy difficulty. Aligned to the CBSE and NCERT syllabus.

How this worksheet helps your child

  • Builds confidence in core Mathematics concepts taught in Class 12 through repeated, varied practice.
  • Aligned to CBSE and NCERT — questions mirror the pattern children see in school tests and unit assessments.
  • Comes with an answer key so parents and students can self-check in minutes, without needing a teacher.
  • Pitched at easy level — use it for daily homework, weekend revision or quick exam warm-ups.

About this worksheet

Welcome to our comprehensive practice worksheet for Class 12 Mathematics, focusing on the fundamental concepts of Application of Derivatives. This worksheet is designed to help students solidify their understanding of how derivatives are used to solve real-world problems and analyze functions. At the Class 12 level, especially under the CBSE curriculum, Application of Derivatives is a crucial chapter that builds upon students' prior knowledge of differentiation. Mastering these basics is essential not only for scoring well in board examinations but also for higher studies in science and engineering. This easy-level practice module is perfect for students who are just beginning to explore this topic or need to reinforce their foundational understanding of concepts like increasing and decreasing functions, tangents and normals to curves, and rates of change. Parents and teachers will find this an excellent resource to support students in grasping these core calculus ideas effectively and preparing them for more complex problems later on.

What your child will learn

  • Practice identifying increasing and decreasing intervals of functions using derivatives.
  • Apply derivatives to find the equations of tangents and normals to various curves.
  • Solve problems involving rates of change in different contexts.
  • Recognise the practical applications of differentiation in everyday scenarios.
  • Understand the geometric interpretation of the derivative.

Understanding the concept

The concept of 'Application of Derivatives' might sound complex, but it's essentially about using the idea of an instantaneous rate of change (which is what a derivative tells us) to understand and solve various mathematical problems. Imagine you're walking up and down a hill. The derivative helps us figure out exactly when you're going uphill (increasing function), downhill (decreasing function), or at the very top or bottom (turning points). When we talk about 'tangents and normals,' think of drawing a straight line that just touches a curve at one point without crossing it (that's a tangent), and another line perpendicular to it at that same point (that's a normal). Derivatives give us the exact slope of this tangent line. This is incredibly useful for understanding the direction and steepness of a curve at any given point. Another important application is 'rates of change.' For example, if you know how fast the radius of a balloon is increasing, derivatives can help you calculate how fast its volume is increasing at the same time. It's all about understanding how one quantity changes in relation to another, like how your speed changes over time. This foundational understanding allows us to analyze various real-world phenomena, from how populations grow to how fluids flow, and is a cornerstone of higher-level mathematics and physics.

Tips for parents & teachers

  • Encourage your child to review the basic differentiation formulas before attempting the worksheet.
  • Guide them to draw diagrams for problems involving tangents and normals to visualize the concepts better.
  • Discuss real-life examples of rates of change to make the problems more relatable for your child.
  • Suggest working through the problems step-by-step, explaining each step aloud if they are stuck.
  • Use this worksheet as a diagnostic tool to identify specific areas where your child might need more practice.

Topics covered

calculusderivativestangentsnormalsrates of changemonotonicitycbseclass 12

How to use this worksheet at home

Open the print view and use your browser's Print dialog to print on regular A4 paper or save as a PDF. Hand the printed sheet to your child (Class 12) and set a relaxed time limit — 15 to 25 minutes works for most Mathematics worksheets. When they're done, open the "With answer key" view and let them self-mark question by question. Re-print as many times as you need; the file never expires and there's no download limit.

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Is it aligned to the CBSE / NCERT syllabus?
Yes. All Class 12 worksheets are built around the CBSE and NCERT pattern so they map cleanly to what your child is studying in school.
Can I print this worksheet at home?
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Does it include an answer key?
Yes — click "With answer key" to print a version with answers included, so parents and students can self-mark in minutes.

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