Question # 1

If 2s = a + b +c, then in any triangle ABC:

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none of these

If A and B are two matrices, then:

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A B = O

AB = BA

AB = I

AB may not be defined

-2 sin α sin ß =

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sin (α + ß) + sin (α - ß)

cos (α + ß) + cos (α - ß)

cos (α + ß) - cos (α - ß)

cos (α - ß) + cos (α - ß)

Two A.Ms. between 3 and 9 are:

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3. 6

5, 7

6, 12

3, 9

Zero is:

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a natural number

a whole number

a positive integer

a negativeinteger

A statement which is true for all possible values of the variables involved in it, is called a:

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tautology

conditional

implication

absurdity

In how many ways two places can be filled by n objects:

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n(n-1)

2!

n(n+1)

None

Amplitude of sin x is:

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R

[-1,1]

0

1

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3

1

4

None

In circular system the angle is measured in:

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radians

degrees

degrees, minutes

degrees, seconds

The other name of quadratic equation is:

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linear equation

1st degree equation

2nd degree equation

none

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A.P

G.P

H.P

none

The period of cot x is:

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Factors of x² + y² are:

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(x + iy) (x - iy)

(x + y) (x - y)

(x + y) (x + y)

none

If A = [aij] and B = [bij] are two matrices of same order r × s, then order of A - B is:

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r - s

r × s

r + s

none of these

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5

-5

-4

4

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r₁

r₂

r₃

r

Conjugate of complex number (-a, -b) is:

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(-a, b)

(-a, -b)

(a, -b)

none of these

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