Question # 1

The real part of the complex number a + bi is:

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b

-b

a

-a

The period of cot 2x is:

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2 cos α cos ß =

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sin (α + ß) - sin (α - ß)

cos (α + ß) - cos (α - ß)

cos (α + ß) + cos (α - ß)

sin (α + ß) + sin (α - ß)

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20

The graph of y = cos^-1 x is obtained by reflecting the graph of y = cos x about:

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x-axis

y-axis

y = x

y = -x

The objects in a set are called:

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elements

sub-sets

whole numbers

overlapping sets

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real numbers

complexnumbers

primenumbers

oddnumbers

Rational numbers are:

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repeating decimals

terminatingdecimals

periodicdecimals

all of these

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B

A

none of these

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integer

rational number

irrational number

natural number

If two sets have no element common, they are called:

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disjoint

over lapping

dissimilar

exhaustive

The period of tan 3x is:

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2

-2

5

-5

Cot1°, Cot2°, Cot3°, .......... Cot89° =

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-1

1

∞

none

The period of sin 2x is:

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π

2π

3π

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ab - cd = 0

ac - bd = 0

ad - bc = 1

ad - bc = 0

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A and B are power sets

A and B are disjoint sets

A and B are super sets

A and B are equal sets

If sin α < 0 and cos α > 0, then α lies in:

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I

II

III

IV

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3×2

2×3

2×2

3×3

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1

0

2

3

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