Question # 1

If sin α = cos ß in any triangle ABC then:

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α + ß = 90°

α + ß = 180°

α + ß = 360°

α + ß

The set of negative integers is closed with respect to:

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addition

multiplication

both (a) and (b)

subtraction

The middle terms of (x+y)²³ are:

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T₁₀,T₁₁

T₁₁,T₁₂

T₁₂,T₁₃

none of these

Product of a complex number and its conjugate is:

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a real number

irrationalnumber

a complexnumber

either real number or complexnumber

A sequence of numbers whose reciprocal form an arithmetic sequence, is known as:

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arithmetic sequence

geometricsequence

harmonicsequence

none of these

- 72° = ___________________:

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none of these

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5

-5

-4

4

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0

-1

>1

none

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cos x

sec x

Distinct objects means:

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identical objects

not identical

similar

none of these

A reference angle Θ is always:

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If sinΘ <0, cosΘ<0 then the terminal arm of the angle lies in quadrant:

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I

II

III

IV

If the elevation of the sun is 30°, the length of the shadow cast by a tower of 150m height is:

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none

If a statement P(n) is true for n = 1 and truth of P(n) for n = k implies the truth of P(n) for n = k + 1, then P(n) is true for all:

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integers n

real numbers n

positive real numbers n

positive integers n

The amplitude and period of 3 sin x are:

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3, π

2, 2π

3, 3π

3, 2π

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None

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S = {1, -1, 2, -2} is a group under:

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multiplication

subtraction

addition

none of these

If 2s = a + b + c, where a, b, c are the sides of a triangle ABC, then area of triangle ABC is given by:

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