Question Paper
Class / Subject: Class 9 (ICSE) · Mathematics
Chapter: Chapter 22 — Chapter 22: Trigonometrical Ratios
Time Allowed: 32 minutes
Max Marks: 16
1. What is sine (sin) of an angle? [1]
(A) Opposite ÷ hypotenuse
(B) Adjacent ÷ hypotenuse
(C) Opposite ÷ adjacent
(D) Hypotenuse ÷ opposite
2. What is cosine (cos) of an angle? [1]
(A) Adjacent ÷ hypotenuse
(B) Opposite ÷ hypotenuse
(C) Opposite ÷ adjacent
(D) Hypotenuse ÷ adjacent
3. What is tangent (tan) of an angle? [1]
(A) Opposite ÷ adjacent
(B) Adjacent ÷ hypotenuse
(C) Opposite ÷ hypotenuse
(D) Hypotenuse ÷ opposite
4. What is tan also equal to? [1]
(A) sin ÷ cos
(B) cos ÷ sin
(C) sin × cos
(D) sin + cos
5. What do trigonometric ratios help find? [1]
(A) Unknown sides or angles in right triangles
(B) Only areas
(C) Only perimeters
(D) Only volumes
6. Where are trigonometric ratios used? [1]
(A) Engineering, architecture, navigation
(B) Nowhere useful
(C) Only in maths class
(D) Only for tests
7. What triangle type do these ratios apply to? [1]
(A) Right triangles
(B) All triangles equally
(C) Only equilateral triangles
(D) Only isosceles triangles
8. Why learn trigonometric ratios? [1]
(A) To measure distances and heights indirectly
(B) No reason
(C) It's not useful
(D) Only for tests
9. What is sine (sin) of an angle? [1]
(A) Opposite ÷ hypotenuse
(B) Adjacent ÷ hypotenuse
(C) Opposite ÷ adjacent
(D) Hypotenuse ÷ opposite
10. What is cosine (cos) of an angle? [1]
(A) Adjacent ÷ hypotenuse
(B) Opposite ÷ hypotenuse
(C) Opposite ÷ adjacent
(D) Hypotenuse ÷ adjacent
11. What is tangent (tan) of an angle? [1]
(A) Opposite ÷ adjacent
(B) Adjacent ÷ hypotenuse
(C) Opposite ÷ hypotenuse
(D) Hypotenuse ÷ opposite
12. What is tan also equal to? [1]
(A) sin ÷ cos
(B) cos ÷ sin
(C) sin × cos
(D) sin + cos
13. What do trigonometric ratios help find? [1]
(A) Unknown sides or angles in right triangles
(B) Only areas
(C) Only perimeters
(D) Only volumes
14. Where are trigonometric ratios used? [1]
(A) Engineering, architecture, navigation
(B) Nowhere useful
(C) Only in maths class
(D) Only for tests
15. What triangle type do these ratios apply to? [1]
(A) Right triangles
(B) All triangles equally
(C) Only equilateral triangles
(D) Only isosceles triangles
16. Why learn trigonometric ratios? [1]
(A) To measure distances and heights indirectly
(B) No reason
(C) It's not useful
(D) Only for tests