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ECAT Mathematics Inverse Trigonometric Functions Online Test

Danial MalikLast Updated: April 18, 2025

ECAT Math Inverse Trigonometric Functions

ECAT Math Inverse Trigonometric Functions Chapter Online Test

Total Questions:	55
Time Allowed:	20 Minutes
Total Marks:	55
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	ECAT Entry Test Mathematics Online Test Interview Questions about Mathematics All Universities Entrance Test Recruitments Tests

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Page 1 of 3

1. The graph of y = sin⁻¹ x is along the

X – axis

Y – axis

Both and b

x = y

2. Sin⁻¹{2A√1 – A²}

Sin⁻¹{2A² – 1}

Sin⁻¹{A² – 2}

3. Tan⁻¹ ½ + Tan⁻¹ 1/13 =

π/6

π/2

π/4

4. Tan⁻¹ (2A/1 – A²) =

Tan⁻¹ A

Tan⁻¹(2/A) =

2 Tan⁻¹ A

Tan⁻¹(A/2) =

6. The equation 2 cos²(x/2) sin²x = x² + 1/x² 0 ≤ x ≤ π/2 has

None of these

No solution

More than one real solution

One real solution

7. Tan⁻¹ A – Tan⁻¹ B =

Tan⁻¹(A + B/1 – AB)

Tan⁻¹(1–AB/A+B)

Tan⁻¹(A – B/1+AB)

Tan⁻¹(1+AB/A – B)

8. Tan⁻¹ A + Tan⁻¹ B + Tan⁻¹ C =

Tan⁻¹(A+B+C–ABC/1–AB–BC–CA)

Tan⁻¹(A–B/1+AB)

Tan⁻¹(A+B/1–AB)

Tan⁻¹(1–AB–BC–CA/A+B+C–ABC)

10. The domain of principal sine function is

[0, 3π/2]

[0, 2π]

[0, π/2]

[–π/2, π/2]

11. One root of the equation cos x – x + ½ = 0 lies in the interval

(π, 3π/2)

(0, π/2)

(– π/2, 0)

(π/2, π)

12. The solution set of the system of equation: x – y = 2π/3, cos x + cos y = 2/3, where x and y are real in:

null set

∞

None of these

a fine non-empty set

13. The value of sin (Cos⁻¹√3/2) is

1/√2

√3/2

None of these

14. Tan⁻¹(– 1) =

π/6

π/2

– π

– π/4

15. Which of the following is solution of cos 3x = ½ = ?

60°

Arc cos 1/6

1/3 arc cos ½

5π/3

16. Tan⁻¹ 1/7+ Tan⁻¹ 1/13 =

Tan⁻¹ 3/46

Tan⁻¹ 9/2

Tan⁻¹ 2/9

17. Tan⁻¹(1) =

π/6

None of these

π/3

π/4

18. Tan⁻¹ 1/3 + Tan⁻¹ 1/5 + Tan⁻¹ 1/7 + Tan⁻¹ 1/8

π/4

π/2

π/6

19. For n ϵ Z, the general solution of the equation (√3 – 1)sin θ + (√3 + 1) cos θ = 2 is

None of these

θ = 2nπ ± π/4 + π/12

θ = nπ +(-1)ⁿ π/4 + π/12

θ = 2nπ ± π/4 - π/12

20. Tan⁻¹ A + Tan⁻¹ (1–A/1+A)

π/4

π/2

π/6

21. Range of cosec⁻¹x is

None of these

(π, 0)

[– π/2, π/2]

(0, π)

22. The principal tangent function is

None of these

One – to – one

Cos x

Sin x

23.

24. If sin 6 θ + sin 4 θ + sin 2 θ = 0, then θ =

None of these

nπ/4 or 2nπ ± π/6

nπ/4 or nπ ± π/3

nπ/4 or nπ ± π/6

25. 2Cos⁻¹ A =

Sin⁻¹{2A² – 1}

Sin⁻¹{A² – 2}

Sin⁻¹{2A² – 1}

Sin⁻¹{A² – 2}

Page 2 of 3

26. Range of Tan⁻¹ x is

[π/2, π/2]

[– π/2, π/2]

[0, π]

27. Tan⁻¹ A + Tan⁻¹ B =

Tan⁻¹(1+AB/A – B)

Tan⁻¹(A + B/1 – AB)

Tan⁻¹(A – B/1+AB)

Tan⁻¹(1–AB/A+B)

28. cot θ = sin 2 θ (θ ≠ nπ, n integer) if θ =

π/2 only

π/4 only

π/4, π/2

π/4, π/3

29. The general solution of sin x – 3 sin 2x + sin 3x = cos x – 3 cos 2x + cos 3x is

nπ + π/8

nπ/2 + π/8

(-1)ⁿ nπ/2 + π/8

2nπ + cos⁻¹ (3/4)

30. The solution of the equation cos² θ + sin θ + 1 = 0 lies in the interval

(5π/4, 7π/4)

(- π/4, π/4)

(π/4, 3π/4)

(3π/4, 5π/4)

31. If 2 tan⁻¹ (cos x) = tan⁻¹ (cosec² x), then x is equal to

π/2

π/3

π/6

32. tan⁻¹(1/4) + tan⁻¹(2/9) is equal to

½ sin⁻¹ (3/5)

½ cos⁻¹ (3/5)

½ tan⁻¹ (3/5)

tan⁻¹ ½

33. General solution of tan 5 θ = cot 2 θ is

θ = nπ/7 + π/3

θ = nπ/7 + π/14 where n ϵ Z

nπ/7 + π/14

θ = nπ/7 + π/2

34. The domain of the function y = cos⁻¹ x is

0 ≤ x ≤ 1

– 2 ≤ x ≤ 2

– 1 ≤ x ≤ 1

– 1 ≤ x ≤ 2

35. If 4 sin² θ = 1, then values of θ are

nπ ± π/3

nπ ± π/6

2nπ ± π/6

2nπ ± π/3

36. The domain of principal cosine function is

[0, π]

[0, π/2]

[0, 2π]

[0, 3π/2]

37. The value of sin [arc cos (- ½ )]is

√3/2

1/√2

None of these

38. If 5 cos 2 θ + 2 cos² θ/2 + 1 = 0, - π < θ < π, then θ =

± π/3, π – cos⁻¹ 3/5

π/3, cos⁻¹ (3/5)

cos – 1 3/5

π/3

39. If sin⁻¹ x = π/5 for some x ϵ (-1,1), then the value of cos⁻¹x is

9π/10

3π/10

7π/10

5π/10

40. Tan⁻¹(3A – A³/1 – 3A²)

3 Tan⁻¹ A

Tan⁻¹ 2A

Tan⁻¹ 3A

2Tan⁻¹ A

41. The values of θ satisfying sin 7 θ = sin 4 θ – sin θ and 0 < θ < π/2 are

π/3, π/4

π/9, π/4

π/3, π/9

π/6, π/9

42. The smallest positive root of the equation tan x – x = 0 lies on

(π, 3π/2)

(π/2, π)

(3π/2, 2π)

(0, π/2)

43. The value of cos [cos⁻¹ (- √3/2) + π/6] is

None of these

-1

44. The principal cosine function is

Onto

One – to – one

Bijective

Into

45. Inverse of sin function is written as

Sin x⁻¹

1/sin x

Sin⁻¹x

(sin x)⁻¹

46. The number of values of x in the interval [0, 5π] satisfying the equation 3 sin² x – 7 sinx + 2 = 0 is

47.

48. The set of values of x for which tan3x–tan2x/1+tan3xtan2x = 1 is

π/4

2nπ + π/4 n = 1,2,3,……

nπ + π/4 n = 1,2,3,……

49. The number of solutions of the equation tan x + sec x = 2 cos lying the interval [0, 2π] is

50.

Page 3 of 3

51. Tan⁻¹ 1/7 + Tan⁻¹ 1/13 =

Tan⁻¹ 2/9

Tan⁻¹ 9/2

Tan⁻¹ 2/9

Tan⁻¹ 3/46

52. The general solution of tan 3x = 1 is

nπ

nπ/3 + π/12

nπ ± π/4

nπ + π/4

53. If sin A = sin B, cos A = cos B, then the value of A in terms of B is

2nπ + B

2nπ – B

nπ + (– 1)ⁿ B

nπ + B

54. Tan⁻¹(x – 1/x – 2) + Tan (x + 1/x + 2) =

Tan⁻¹(2x² + 4/2x²+ 3)

Tan⁻¹(2x² + 3/2x²+ 4)

Tan⁻¹(2x² – 4/2x²– 3)

Tan⁻¹(2x² – 3/2x²– 4)

55. If (1 + tan θ)(1 + tan Ø) = 2, then θ + Ø =

60°

45°

30°

75°

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Danial MalikLast Updated: April 18, 2025

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ECAT Mathematics Inverse Trigonometric Functions Online Test

ECAT Math Inverse Trigonometric Functions

ECAT Math Inverse Trigonometric Functions Chapter Online Test

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Danial Malik

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ECAT Math Inverse Trigonometric Functions

ECAT Math Inverse Trigonometric Functions Chapter Online Test

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Danial Malik

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