A square matrix [aij] in which aij = 0 for i ≠ j and aij = k (constant) for i = j is called a:

1.  unit matrix

2.  scalar matrix

3.  null matrix

4.  diagonal matrix

4

scalar matrix

Explanation :
No Explanation available for this question

for x > 2, then f(11) is equal to

1.  7/6

2.  5/6

3.  6/7

4.  5/7

4

6/7

Explanation :
No Explanation available for this question

then the values of h, a, b are respectively

1.  -6, -12, -18

2.  -6, 4, 9

3.  -6, -4, -9

4.  -6, +12, 18

4

-6, -4, -9

Explanation :
No Explanation available for this question

If a is a complex number and b is a real number, then the equation represents a:

1.  straight line

2.  parabola

3.  circle

4.  hyperbola

4

straight line

Explanation :
No Explanation available for this question

then x is equal to

1.  -2

2.  -1

3.  1

4.  2

4

1

Explanation :
No Explanation available for this question

, then k is eqal to

1.  0.5

2.  0.6

3.  0.7

4.  0.8

4

0.5

Explanation :
No Explanation available for this question

If θ = π/6, then the 10th term of 1 + (cosθ + isinθ) + (cosθ + isinθ)2 + (cosθ + isinθ) +..... is equal to:

1.  i

2.  -1

3.  1

4.  -i

4

-i

Explanation :
No Explanation available for this question

Let l1 and l2 be two lines intersecting at P.If A1,B1,C1 are points on l1 and A

1.  56

2.  55

3.  46

4.  45

4

45

Explanation :
No Explanation available for this question

sin5θ/sinθ is equal to

1.  16cos4θ – 12cos2θ + 1

2.  16cos4θ + 12cos2θ + 1

3.  16cos4θ – 12cos2θ – 1

4.  16cos4θ + 12cos2θ – 1

4

16cos4θ – 12cos2θ + 1

Explanation :
No Explanation available for this question

1.  9

2.  16

3.  25

4.  36

4