Question # 1

r₂ =

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Solution set of the simultaneous equations : x + y = 1, x - y = 1 is:

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{(0,0)}

{(1,0)}

{(0,1)}

{(1,1)}

If the initial side of an angle is the positive x-axis and the vertex is at the origin, the angle is said to be in the _____________:

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initial position

finalposition

normalposition

standardposition

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

Sum of all four fourth roots of unity is:

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1

0

-1

3

Product of a complex number and its conjugate is:

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a real number

irrationalnumber

a complexnumber

either real number or complexnumber

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2

-2

5

-5

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scalar matrix

diagonalmatrix

lower triangularmatrix

upper triangularmatrix

When two sides and included angle is given, then area of triangle is given by:

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all of these

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a is an element of a set A

a is subset of A

a is a whole number

a contains A

The period of cosec 3x is:

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180° = _____________:

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π radians

If cosec Θ > 0 and cot Θ < 0, then terminal arm of the angle lies in:

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I

II

III

IV

The set of negative integers is closed with respect to:

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addition

multiplication

both (a) and (b)

subtraction

The probability that a number selected from the numbers 1, 2, 3, 4, 5, ......, 16 is a prime number is:

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cos⁴Θ - sin⁴Θ =

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sin 2Θ

cos 2Θ

tan 2Θ

sec 2Θ

If A is a square matrix, then A - A^t is:

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cos x

sec x

Division of a natural number by another natural number gives:

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always a natural number

always an integer

always a rationalnumber

always an irrational number

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The range of y = cos^-1 x function is:

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