CBSE Class 10 Maths Introduction To Trigonometry Chapter 8 MCQ

CBSE CLASS 10 MATHEMATICS/ MCQ
Multiple Choice Questions / INTRODUCTION TO TRIGONOMETRY- Chapter 8

1. The study of relationships between the sides and angles of a triangle is —–

A. Statistics
B. Trigonometry
C. Geometry

2. The values of the trigonometric ratios of an angle ———— with the lengths of the sides of the triangle, if the angle remains the same.

A. vary
B. Do not vary
C. None of these

3. The value of sin A or cos A never exceeds ————

A. One
B. Two
C. Three

4. The value of sec A or cosec A is always —————-

A. Less than or equal to one
B. Greater than or equal to one
C. Equal to one

5. Which of the following is false?

A. sin (90 – A) = sec A
B. cos (90 – A) = sin A
C. tan (90 – A) = cot A

6. The value of tan 45 is ————–

A. 1
B. 0
C. 1/2

7. Ratios of sides of a right triangle with respect to its acute angles are knownas ————–

A. Trigonometric Identities
B. Trigonometric Ratios
C. Trigonometry

8. sin (90 – A) = ————-

A. sin A
B. cos A
C. tan A

9. Reciprocal of sin A is ————-

A. cosec A
B. sec A
C. cot A

10. Reciprocal of cos A is ———-

A. cosec A
B. sec A
C. cot A

11. Reciprocal of tan A is ————–

A. cosec A
B. sec A
C. cot A

12. If sin A = cos A and the value of A lies between o and 90, then A = ———-

A. 0
B. 45
C. 90

13. The value of cot A and tan (90 –A) are ————

A. Different
B. Same
C. None of these

14. If tan A = 4/3 and sin A = 4/5 then cos A = —————–

A. 4/5
B. 3/5
C. ¾

15. Which of the following is true?

A.sec A = 12/5 for some value of angle A.
B. The value of tan A is always less than one.
C. cot A is the product of cot and A.

ANSWERS:

1. Trigonometry
2. Do not vary
3. One
4. Greater than or equal to one
5. sin (90- A) = sec A
6. One
7. Trigonometric Ratios
8. cos A
9. cosec A
10. sec A
11. cot A
12. 45
13. Same
14. 3/5
15. sec A = 12/5 for some value of angle A.

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