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NAT I Engineering Mathematics MCQs With Answers
Question # 1
The principal value of sin
-1
[√3/2] is
Choose an answer
π/3
-π/3
2π/3
5π/3
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Question # 2
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
α
2
+ β
2
= 1
α = -b/a and β= c/a
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Question # 3
Two dice are rolled The number of possible out come in which at least one die shows 2 is?
Choose an answer
5
12
11
7
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Question # 4
What is the conjugate of -7 -2i ?
Choose an answer
-7 + 2i
7 + 2i
7-2i
√53
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Question # 5
Sin 720° = ________
Choose an answer
1
0
2
1/2
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Question # 6
Area of ΔABC=
Choose an answer
ab sin α
1/2 ab sin α
1/2 ac Sin γ
1/2 ac Sin β
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Question # 7
If in isosceles right angled triangle one side is a then hypotenuse is
Choose an answer
a√2
a/2
a
Cannot be determined by given
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Question # 8
The set {1, -1, i, -i}, form a group under
Choose an answer
addition
multiplication
subtraction
None
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Question # 9
The cube roots of unity ω = -------------------------
Choose an answer
1-i √-3 / 2
-1+i √-3 / 2i
-1+i √3 / 2
1+i √3 / 2
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Question # 10
1/x
2
-1 = ? (in case of making partial fraction)
Choose an answer
Ax +B/x
2
-1
A/x + B/ x- 1
A/ x+1 + B/x-1
None
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Question # 11
If |A| ≠ 0 then A is called
Choose an answer
1
-1
±1
0
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