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Mathematics ECAT Pre Engineering Online Test MCQs With Answers
Question # 1
w
4
= ______
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0
1
w
w
2
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Question # 2
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Question # 3
Sin h
-1
x = _________
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Question # 4
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e
x
+ c
e
-x
+ c
x e
x
+ c
not possible
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Question # 5
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a
x
a
x
In a
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Question # 6
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Question # 7
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Question # 8
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a = a
a < a
a > a
a
2
= a
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Question # 9
The domain of the principal tan function is
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Question # 10
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Question # 11
If x+y+z+......+2n = 2n+1-1∀n∈W,then cube root of xyz is equal to
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1
4
2
8
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Question # 12
Every whole number is
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A real number
An irrational number
A prime number
A negative integer
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Question # 13
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Question # 14
The maximum value of Z = 3x+ 4y subjected to the constrains x+ y≤ 40,x+ 2y≤ 60, x≥ 0 and y≥ 0 is
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120
100
140
160
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Question # 15
2cos2 a/2 =______;
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1+sina
1-sina
1+cosa
1-cosa
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Question # 16
The period of|sin2x| is
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π/2
-π/2
π
π/3
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Question # 17
If D = {a} , the P(D) =
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{a}
∅
{∅,{a}}
{∅,a}
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Question # 18
The decimal fraction in which we have finite number of digits in its decimal part is called.
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recurring decimal fraction
Non terminating faction
Non recurring fraction
terminating decimal fraction
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Question # 19
If S and P are the sum and the product of roots of a quadratic equation, then the quadratic equation is
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x
2
+ Sx - P = 0
x
2
- Sx + P = 0
x
2
- Sx - P = 0
X
2
+ Sx + P = 0
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Question # 20
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0
2
4/3
5/3
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Question # 21
When we expand (a + 2b)
5
then
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a
5
+ 10a
4
b + 40a
3
b
2
+ 80a
2
b
3
+ 80ab
4
+ 32b
5
a
5
+ a
4
b + a
3
b
2
+ a
2
b
3
+ ab
4
+ b
5
5a
5
+ 4a
4
b + 3a
3
b
2
+ 2a
2
b
3
+ 1 ab
4
+ b
5
None
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Question # 22
Ifπ≤x≤2π, then cos-1 (cos x)=
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cos x
-x
1/x
-x
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Question # 23
The physical quantity which can be specified by a number alongwith unit is called a
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scalar
vector
constant
none of these
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Question # 24
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2
2
- n - 1
1 - 2
-n
n + 2
-n
-1
2
n
- 1
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Question # 25
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Question # 26
Period of tan 4x is ______
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Question # 27
x = ________ is in the solution of 2x - 5 > 0
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0
2
-2
3
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Question # 28
If a 1-1 correspondence can be established b/w two sets A and B, then they are called
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Equal sets
Equivalent sets
Over lapping sets
None of these
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Question # 29
The line 2x +√6y =2 is a tangent to the curve x2 -2y2 =4 The point of contact is
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(√6,1)
(2,3)
(7,-2√6)
(4,-√6)
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Question # 30
Which of the following is an identity matrix?
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none of these
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Question # 31
The set of integers is a subset of
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The set of natural numbers
The set of whole numbers
The set of prime numbers
The set of rational numbers
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