1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

RD Sharma - Mathematics

5. Trigonometric Functions

1. Sets
2. Relations
3. Functions
4. Measurement of Angles
5. Trigonometric Functions
6. Graphs of Trigonometric Functions
7. Values of Trigonometric Functions at Sum of Difference of Angles
8. Transformation Formulae
9. Values of Trigonometric Functions at Multiples and Submultiple of an Angles
10. Sine and Cosine Formulae and their Applications
11. Trigonometric Equations
12. Mathematical Induction
13. Complex Numbers
14. Quadratic Equations
15. Linear Inequations
16. Permutations
17. Combinations
18. Binomial Theorem
19. Arithmetic Progressions
20. Geometric Progressions
21. Some Special Series
22. Brief Review of Cartesian System of Rectangular Co-ordinates
23. The Straight Lines
24. The Circle
25. Parabola
26. Ellipse
27. Hyperbola
28. Introduction to 3-D Coordinate Geometry
29. Limits
30. Derivatives
31. Mathematical Reasoning
32. Statistics
33. Probability

Exercise 5.1

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 A 26 B 26 C

Exercise 5.2

1 A 1 B 1 C 1 D 2 3 4 5

Exercise 5.3

1 A 1 B 1 C 1 D 1 E 1 F 1 G 1 H 1 I 1 J 1 K 1 L 1 M 1 N 2 A 2 B 2 C 2 D 2 E 2 F 2 G 3 A 3 B 3 C 3 D 3 E 4 5 6 7 8 A 8 B 9 A 9 B 9 C 9 D 9 E

Very Short Answer

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

MCQ

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

Q. 21

Mark the correct

Class 11th RD Sharma - Mathematics 5. Trigonometric Functions

Answer :

Let cosec x =a, cot x = b

∴ According to the question

But, cosec²x –cot²x =1

⇒ a² – b² = 1

⇒ (a-b)(a + b) = 1

a + b =11/2 …(1)

a-b =2/11 …(2)

Adding (1) and (2)

Rate this question :

How useful is this solution?

We strive to provide quality solutions. Please rate us to serve you better.

PREVIOUSMark the correct NEXTMark the correct

Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts

Dedicated counsellor for each student

24X7 Doubt Resolution

Daily Report Card

Detailed Performance Evaluation

caricature

view all courses

RELATED QUESTIONS :

Find the values oRD Sharma - Mathematics

Prove that :
<RD Sharma - Mathematics

The value of sin Mathematics - Exemplar

The value of <spaMathematics - Exemplar

If <span lang="ENMathematics - Exemplar

If <span lang="ENMathematics - Exemplar

Fill in the blankMathematics - Exemplar

Fill in the blankMathematics - Exemplar

If 12 sin x – 9 sRD Sharma - Mathematics

Write the intervaRD Sharma - Mathematics