Question # 1

The exact value of cos-1 (0) is

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π/2

-π/2

3π

π-π/6

The square matrix A is skew-symmetric when At =

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-B

-C

-A

-D

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If B⊆ A, then complement of B in A is = -----------------------

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A-B

A∩B

B-A

A∪B

If eccentricity of ellipse becomes zero then it takes the form of

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A parabola

A circle

A straight line

None of these

The mid point of the line segment joining the points (4,0) and (0,4) is

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(4,4)

(2,2)

(-4,-4)

(-2,-2)

Domain of cos x is ______

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If a (p + q)²+ bpq +c = 0 and a (p + r)²+ 2 bpr + c = 0, then qr equals

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p²+ c/a

p²+ a/c

p²+ c/a

p²- c/a

If one root of the equation ix²- 2(i + 1) x +(2 - i) = 0 is 2 - i, then the other root is

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-i

2 + i

i

2 - i

If P = {x/x = p/q where p,q∈ Z and q≠ 0}, then P is the set of

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Irrational numbers

Even numbers

Rational numbers

Whole numbers

The set {1,-1, i, -i} form a group under

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Addition

Multiplication

Subtraction

None

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parallel vectors

perpendicular vectors

concurrent vectors

collinear vectors

u,v,wand u x (v.w) are

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Equal

Parallel

Additive immense of each other

Meaningless

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I andII quadrants

II andIII quadrants

II andIVquadrants

none of these

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0

1

13

If the circle x²+ y²+ 2gx +2fy + c = 0 passes through the origin then

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c = 0

c = -1

c = -2

c = 1

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For any two sets A and, A ⊆ B if

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x ∈ A ⇒ x ∈ B

x ∉ A ⇒ x ∉ B

x ∈ A ⇒ x ∉ B

None of these

A sequence is a function whose domain is

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N

Subset of N

R

None of these

The distance between the points A(3,1) and B(-2,-4) is

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5

25

10

How many necklaces can be made from 6 beads of different colours?

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120

60

24

15

Express as a sum or difference: 2 sin 5θcosθ

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cos 4θ- cos 2θ

sin 4θ+ sin 2θ

cos 4θ+ cos 2θ

sin 4θ- sin 2θ

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tan 3x + c

cot 3x + c

- cot 3x + c

If cos 20°=K and cos x=2 k²-1, then the possible values of x between 0° and 360° are

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140°

50° and 140°

50° and 130°

40° and 320°

If n is any positive integer then 2ⁿ> 2(n + 1) is true for all

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In one hour, the hour hand of a clock turns through

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In a triangle ABC, if angle A = 72° , angle B = 48° and c = 9 cm then Ĉ is

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69°

66°

60°

63°

The fifth term of (a+2x3)17 is

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4013 x3a13

2208a13 x12

223x7a18

38080a13 x12

A square matrix A = [aij] is lower triangular matrix when:

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aij = 0 for all i < j

bij = 0

cij = 0

dij =0

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