# If is a singular matrix ,then λ is

1.  2

2.  3

3.  4

4.  15

4

3

Explanation :
No Explanation available for this question

# C1+4C2+7C3+.......+(3n-2)Cn is equal to

1.  (3n-4)2n+1

2.  (3n-4) 2n-1+2

3.  (3n-4)2n-1-2

4.  none of these

4

none of these

Explanation :
No Explanation available for this question

# The term independent of x in the expansion of [ax+(b/x)]14 is

1.  14! a7b7

2.  (14!/7!) a7b7

3.  [14!/(7!)2] a7b7

4.  [14!/(7!)3] a7b7

4

[14!/(7!)<sup>3</sup>] a<sup>7</sup>b<sup>7</sup>

Explanation :
No Explanation available for this question

# If nC4,nC5,nC6 are in A.P,then n is

1.  14

2.  12

3.  7

4.  18

4

7

Explanation :
No Explanation available for this question

# tan (15/2)0 is equal to

1.  [2√2-(1+√3)]/[√3-1]

2.  (1+√3)/1√3

3.  (1/√3)+√3

4.  none of these

4

(1/&#8730;3)+&#8730;3

Explanation :
No Explanation available for this question

# The value of cos 2550+sin 1650 is

1.  0

2.  (√3-1)/ √2

3.  (1+√3)/ 2√2

4.  (1+√2)/ √2

4

0

Explanation :
No Explanation available for this question

# If a is any real number,the number of roots of cot x-tan x = a,in the first quadrant is

1.  0

2.  1

3.  2

4.  none of these

4

1

Explanation :
No Explanation available for this question

# The value of Σa2(cos2B-cos2C) is equal to

1.  0

2.  1

3.  2

4.  3

4

0

Explanation :
No Explanation available for this question

# If a cos A= b cos B in any ∆ABC,then C is equal to

1.  450

2.  600

3.  900

4.  none of these

4

90<sup>0</sup>

Explanation :
No Explanation available for this question

# The sides of ∆ are 13,14,15 units, the radius of a in-radius of it is

1.  4

2.  2

3.  14

4.  none of these

4