Assam Direct Recruitment Grade III & Grade IV Mathematics MCQ in Bodo

 

Assam Direct Recruitment Grade III & Grade IV Mathematics MCQ in Bodo 

Here is some Important MCQ of Maths 

1. (sin 45° + cos 45°) नि मानआ

The value of (sin 45° + cos 45°) is

(a) 1/√2

(b) √2

(c) √3/2

(d) 1

Ans: (b) √2

sin 45° + cos 45° = (1/√2) + (1/√2)

= (1 + 1)/√2

= 2/√2

= (√2 . √2)/√2

= √2

2. जुदि sin A = 1/2 , अब्ला cot A नि मानआ

If sin A = 1/2 , then the value of cot A is

(a) √3

(b) 1/√3

(c) √3/2

(d) 1

Ans: (a) √3

 

sin A = 1/2

cos²A = 1 – sin²A

= 1 – (1/2)²

= 1 – (1/4)

= (4 – 1)/4

= 3/4

cos A = √(3/4) = √3/2

cot A = cos A/sin A = (√3/2)/(1/2) = √3

 

3. sin 60° cos 30° + sin 30° cos 60° नि मानआ

The value of sin 60° cos 30° + sin 30° cos 60° is:

(a) 0

(b) 1

(c) 2

(d) 4

Ans: (b) 1

 

sin 60° = √3/2, sin 30° = ½, cos 60° = ½ and cos 30° = √3/2

 

 (√3/2) x (√3/2) + (½) x (½)

= (3/4) + (1/4)

= 4/4

= 1

 

4. x²–2x –8 नि लाथिखʼआ

The zeroes of x²–2x –8 are:

(a) (2,-4)

(b) (4,-2)

(c) (-2,-2)

(d) (-4,-4)

Answer: (b) (4,-2)

 x²–2x –8 

= x²–4x + 2x –8

= x(x–4)+2(x–4)

= (x-4)(x+2)

Therefore, x = 4, -2.

5. 2–x² +x³ आव  x² नि थाफादेरआ

(a) 1

(b) -1

(c) 2

(d) -2 

Answer: (b) -1 

6. P(x) = (x-1) (x-2) नि लाथिखʼआ मा मा

(a) -2, 3 

(b) 2, -2 

(c) 1, 2

(d) 3, -3 

Answer: (a) -2, 3 

7. P(x)=  9x + 4 नि लाथिखʼआ: 

(a) 4/9

(b) 9/4

(c) -9/4

(d) -4/9 

Answer: (d) -4/9 

8. X = -1 नि थाखाय P (x) = 5x - 4x² + 3 नि माना जागोन 

(a)  6

(b) -6

(c)  3

(d) -3

Answer: (b) -6

9. जुदि (x+a) आ x⁴ + a²x² + 3x - 6a नि मोनसे सानजाबगिरि, अब्ला आ a मानआ

a) 1

(b) -1

(c)  2

(d) 0

Answer: (d) 0

10. गाहायनि बबे रान्जोब्था अनजिमा ?

a) √23

(b) √225

(c)  11

(d) 3√5

Answer: (b) √225

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