Question # 1

The square roots of negative numbers is called

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Real no

Complex no

Positive no

Negative no

If (0, 0) and (-1, 0) are end points of a diameter, then the equation of the circle is

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The set { {a,b} } is

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Infinite set

Singleton set

Two points set

Empty set

What is the period of 5 cot x=?

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π

-π

π/2

2π

cos2a=______;

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cos2 a-sin2 a

2cos2 a-1

1-2 sin2 a

All of these

The sum of the even coefficients in the expansion (1 + x)ⁿis

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n²

2^n-2

2^n-1

2ⁿ

The eccentricity of the conic 9x²- 16y²= 144 is

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4/5

5/4

4/3

3/4

An integral of 1/x dx is:

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1/x²

1/-x²

1/lnx

lnx

If a=5j + 2j,b=2i -3j, then|a+2b|=

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√21

√97

√39

None of these

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By expressing sin 125° in terms of trigonometrical ratios, answer will be

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sin 65° = 0.9128

sin 55° = 0.8192

sin 70° = 0.5384

sin 72° = 0.1982

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The number of words that can be formed out of the letters of the word ASSASSINATION is

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π

2π

π/2

None of these

Corner point of the system x - y≤ 2,x + y≤ 4,2x -y≤ 6,x≥ 0,y≥ 0

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(1,4)

(4,2)

(3,1)

(4,1)

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In how many ways can 5 persons be seated at a round table

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5!

4!

3!

120

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The line y = 4x + c touches the hyperbola x²- y²= 1 if

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The symbol of irrational is

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W

N

Q

Q'

A committee consists of 9 experts taken from three institutions A, B, and C, of which 2 are from, A, 3 form B and 4 from C. If three experts resign, then the probability that they belong to different institutions is

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1 / 729

1 / 24

1 / 21

2 / 7

120° degrees are equal to how many radians?

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16 / 7

6 / 17

7 / 16

None of these

The multiplicative inverse of -3i is

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3i

-3i

-1/3i

1/3 i

f(x) = 2^x+ 3 . 2^2x+ 5 is

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trigonometric function

algebraic function

exponential function

logarithmic function

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Square matrix

Row matrix

Symmetric matrix

Null matrix

A number A is called the arithmetic mean between a and b if a, A, b is ______

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Arithmetic sequence

Geometric sequence

Harmonic sequence

Arithmetic sequence

The set (Z, +) forms a group

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Forms a group w.r.t addition

Forms a group w.r.t multiplication

Non commutative group w.r.t multiplication

Doesn't form a group

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cos x + c

-sin x + c

-cos x + c

sin x + c

If cosα= 4/5, then cosα/2

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The product of cube roots of unity is

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Zero

1

-1

None of these

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