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NAT I Engineering Mathematics MCQs With Answers

Question # 1

Sin 720° = ________

Choose an answer

1/2

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Question # 2

What is the domain of y = Cot^-1 x?

Choose an answer

Set of irrational numbers only

Set of all real numbers

Set of integers only

Set of complex numbers only

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Question # 3

8 > t then

Choose an answer

(s -t) ²>(t -8)²

(s -t) ²<(t -8)²

(s -t) ²=(t -8)²

None

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Question # 4

If a rectangle has an area 81x² and length of 27x. then what is its width?

Choose an answer

3x²

9x²

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Question # 5

If i,m,n are the direction cosines of a vector O̅P̅ then

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I² + m² + n² =0

I² - m² + n² =1

I² + m² + n² =1

I² + m² - n² =0

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Question # 6

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

Choose an answer

Y = -x log x- x +c

Y = x log x + x²

Y = x log x -x +c

Y= 2x log x + 2x +c

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Question # 7

Sec^-1 x=

Choose an answer

Cos^-1 1/x

Cosec^-1 1/x

Cos-1 (-x)

Tan^-1 x

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Question # 8

If α and β be irrational roots of a quadratic equation, then

Choose an answer

α = b/a and β = ca

α = a/b and β = -c/a

α² + β² = 1

α = -b/a and β= c/a

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Question # 9

The set of complex numbers forms a group under the binary operation of

Choose an answer

±1

{0,1}

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Question # 10

If you looking a high point from the ground then the angle formed is

Choose an answer

Angle of elevation

Angle of depression

Right angle

Horizon

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Question # 11

The multiplicative inverse of x such that x = 0 is

Choose an answer

-x

does not exist

1/x

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