Question # 1

cos (α+β) + cos (α-β) =

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4 cosαcosβ

2 cosαcosβ

2 sinαsinβ

2 sinαcosβ

The coordinates of a point P(x,y) referred to XY-system are

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(x+y,y+k)

(x-h,y-k)

(x,y)

(x-h,y-k)

If a force F = 2i + j +3k acts at point (1,-2,2) of a body then the moment of F about a pint lying on the line of action of the force is

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5

Equal to the moment of the force about origin

0

Cannot be found

If Sin A = sin B, cos A = cos B, then the value of A in terms of B is

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A triangle has six

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side

elements

angle

tangents

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1

2

3

4

The vector i = [1,0] is called unit vector along:

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x-axis

y - axis

z- axis

Botha a and y-axis

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Scalar matrix

Identity matrix

Null matrix

Symmetric matrix

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f(x) = sin x is:

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an odd function

an even function

an implicit function

an exponential function

If circumference of circle is divided into 360 congruent parts the angle subtended by one part at the centre of circle is

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1 degree

1 second

1 minute

1 radian

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