Question # 1

In any triangle ABC, law of cosines is:

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sin^-1 (-x) =

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-sin^-1 x

sin^-1x

π + cos^-1x

-cos^-1x

The next term of the sequence-1, 2, 12, 40, .........is:

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112

212

144

none

cos (α-ß) =

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cos α cos ß + sin α sin ß

cos α cos ß - sin α sin ß

cos α cos ß + sin α cos ß

sin α cos ß - sin α sin ß

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A

B

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T₆

T₇

T₈

T₅

G.M between -2i and 8i is:

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4 or -4

4i or -4i

2 or -2

none

In any triangle ABC, law of sines is:

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Equations having a common solution are called:

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linear

quadratic

homogeneous

simultenaeous

2 sin α cos ß =

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sin (α + ß) - sin (α - ß)

cos (α + ß) + cos (α - ß)

sin (α + ß) + sin (α - ß)

cos (α + ß) - cos (α - ß)

cos(tan^-1∞) =

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0

∞

1

Rational numbers are:

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repeating decimals

terminatingdecimals

periodicdecimals

all of these

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degree of P(x) = degree of Q(x)

degree of P(x) < degree of Q(x)

degree of P(x) > degree of Q(x)

none of these

sin (Θ - π) =

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If a set is described by listing its elements within brackets is called:

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set builder notation

tabular form

descriptive method

none of these

The roots of the equation 25x² - 30x + 9 = 0 are;

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rational

irrational

equal

complex

Which one is radical equation:

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ax² + bx + c

ax + b = 0

2^x = 16

If A and B are two matrices, then:

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A B = O

AB = BA

AB = I

AB may not be defined

No. of necklaces can be made from 7 beads of different colors ?

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360

120

60

70

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

cos (2sin^-1 x) =

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1- 2x²

1 + 2x²

2x²- 1

x²- 1

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