Question # 1

If A = [a_ij] and b = [b_ij] are the matrices of the order 3x3 then A-B=

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Circle

Ellipse

Parabola

Hexagon

What is the conjugate of -7 -2i ?

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-7 + 2i

7 + 2i

7-2i

√53

If y = (ax)^m + b^m, then dy/dx equals

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m (ax)^m x^m-1

ma^m x^m-1

m a^m x^m-1

m a^m x^m-2

The direction cosines of y-axis are

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1,0,0

0,1,0

0,0,1

1,1,1

The general solution of the differential equation dy/dx = log x is

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Y = -x log x- x +c

Y = x log x + x²

Y = x log x -x +c

Y= 2x log x + 2x +c

If ab > 0 and a < 0, which of the following is negative?

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b

-b

-a

(a - b)²

If Cosα = 3/5, Cosβ = 5/13, then

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Cos(α +β) =33/65

Sin(α +β) =56/65

sin²(α +β/2) =1/65

Cos(α +β) =63/65

Sin-1 (√2/2)=?

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π/2

π/3

3π/4

2π

The mid point of the line joining (=1,-3) to(3,-5) is

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(1, 1)

(1,-1)

(2, -8)

(1, -4)

A point of a solution region where two of its boundary lines intersect is called

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Boundary

Inequality

Half plane

Vertex

The value of x, and y, when (x+iy)²=5+4i

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X=2, y=-1

X=-2, y=1

X=2, y=-i

X=2, y=2

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NAT I General Science Mathematics MCQs With Answers

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