Question # 1

A reference angle Θ is always:

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The quadrant of an angle Θ is determined by its:

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sign

value

ratio

magnitude

If A is non singular matrix then A^t is:

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singular

nonsingular

symmetric

none

If tan Θ > 0 and sin Θ < 0 then terminal arm of the angle lies in quadrant:

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I

II

III

IV

Four fourth roots of 625 are:

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±5,±5i

±5,±25i

±25,±25i

none of these

For a square matrix A, |A| equals:

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A^t

|A^t|

-|A^t|

-A^t

No. of ways of solving a quadratic equation:

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1

3

2

4

The range of principal tangent function is:

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sin (α - ß) =

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Sum of all four fourth roots of unity is:

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1

0

-1

3

The additive inverse of a real number is a:

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0

-a

a

A circle drawn inside a triangle and touching its sides is known as:

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A key ring is an example of:

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permutation

circulation permutation

combination

none

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

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multiplication

subtraction

addition

none of these

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rationalnumber

irrationalnumber

naturalnumber

wholenumber

For what value of k, the sum of the roots of the equation x² + kx + 4 = 0 is equal to the product of its roots:

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±1

4

±4

-4

tan^-1 (-x) =

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tan^-1x

cot^-1x

-tan^-1x

-cot^-1x

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

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a

b

bi

none of these

Graphs of trigonometric function within their domains are:

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line segments

sharp corners

broken lines

smooth curves

1 radian is equal to:

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180°

none of these

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i

0

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