Class XI Mathematics

Chapter 3: Trigonometric Functions

Standard NCERT & CBSE aligned study curriculum. Master concepts, track accuracy, revise weak areas, and challenge yourself with 9 customized practice modes.

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Worksheet Details:

  • Title: Class XI Math: Trigonometric Functions Printable Sheet
  • Format: Print Optimized CSS stylesheet
  • Sections: Formulas checklist, 5 assessment questions, worked keys

NexPro Education Worksheet

Class XI Mathematics: Trigonometric Functions

Name: ______________________Date: __________________Score: ______ / 5

Section I: Key Formulas

Radian Conversion Formula
\text{Radian} = \text{Degree} \times \frac{\pi}{180}
Pythagorean Identity
\sin^2 x + \cos^2 x = 1

Section II: Answer the Questions

1. If cos 1 sin xy x= + , then find dy dx .

Solve and write the step-by-step solution in the workspace below.

2. Prove the following : sin 10° + sin 20° + sin 40° + sin 50° = sin 70° + sin 80°.

Solve and write the step-by-step solution in the workspace below.

3. Prove the following identity: tan 13A - tan 7A - tan 6A = tan 13A tan 7A tan 6A

Solve and write the step-by-step solution in the workspace below.

4. If x + iy = a ib c id + + , prove that (x2 + y2)2 = 2 2 2 2 a b c d + + .

Solve and write the step-by-step solution in the workspace below.

5. Show that the points A(1, 2, 3), B(-1, -2, - 1), C(2, 3, 2) and D(4, 7, 6) are the vertices of a parallelogram ABCD, but it is not a rectangle.

Solve and write the step-by-step solution in the workspace below.