Question # 1

If any two rows of a square matrix are interchanged, the determinant of the resulting matrix:

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is zero

is multiplicative inverse of the determinant of the original matrix

is additive inverse of the determinant the original matrix

none of these

Sum of all three cube roots of unity is:

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1

-1

0

3

The additive inverse of a real number is a:

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0

-a

a

Number of terms in the expansion of (a+b)ⁿ is:

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n

n+1

n-1

none of these

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The graph of x = sin y is obtained by reflecting the graph of y = sin x about the line:

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x axis

y axis

y = x

y = -x

The period of sec 2x is:

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A set containing finite number of elements is called:

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nullset

superset

finiteset

infiniteset

A biconditional is written in symbols as:

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(x + 3) (x + 4) = x2 + 7x + 12 is:

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For what value of k, the roots of the equation x² + √k x + 2 = 0 are equal:

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1

8

2

4

The value of ⁵C₂ is:

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1

10

20

30

The domain of principal sine function is:

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The lengths of the sides of a triangle are proportional to the sines of the opposite angles to the sides. This is known as:

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The law of sines

The law of cosines

The law of tangents

The fundamental law

No. of arrangements of the letters of the word plane taking all letters at a time:

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5

1

none

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

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I

II

III

IV

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tan x

cot x

Inverse of an element in a group is:

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infinite

finite

unique

not possible

What is called the arrangement of numbers formed according to some definite rule ?

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arithmetic sequence

geometricsequence

sequence

none of these

An infinite sequence has no:

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nth term

last term

sum

none

In binomial expansion of (a+b)n, n is positive integer the sum of even coefficients equals:

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none of these

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