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Mathematics ECAT Pre Engineering Chapter 12 Trigonometric Functions and Identities Online Test MCQs With Answers
Question # 1
In any triangle ABC,with usual notationαsinβ =____;
Choose an answer
b sinα
bsinβ
αsinα
None of these
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Question # 2
sin
2
α
cos
2
α
=
Choose an answer
-1
0
1
None of these
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Question # 3
sec (-360°) = ______
Choose an answer
0
1
2
3
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Question # 4
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Question # 5
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Question # 6
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Question # 7
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Question # 8
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Question # 9
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Question # 10
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Question # 11
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Question # 12
sin (
α
+
β
) - sin (
α -
β
) =
Choose an answer
4 cos
α
sin
β
2 cos
α
sin
β
4 cos
α
cos
β
4 sin
α
sin
β
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Question # 13
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Question # 14
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Question # 15
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Question # 16
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Question # 17
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Question # 18
Tan 2
θ=
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Question # 19
Choose an answer
quadrant I
quadrant II
quadrant III
quadrant IV
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Question # 20
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Question # 21
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Question # 22
cos (
α
-
β
) = cos
α
cos
β
+ sin
α
sin
β
is true for all
Choose an answer
α
>
β
> 0
α
>
β
β
>
α
None of these
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Question # 23
Express as a sum or difference: 2 sin 5
θ
cos
θ
Choose an answer
cos 4
θ
- cos 2
θ
sin 4
θ
+ sin 2
θ
cos 4
θ
+ cos 2
θ
sin 4
θ
- sin 2
θ
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Question # 24
sin(180° -
θ)=
Choose an answer
cos
θ
-cos
θ
Tan
θ
Sin
θ
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Question # 25
Which one is a pair of allied angles
Choose an answer
(180° -
θ)
(180° -
θ,
180° +
θ)
(180° +
θ)
None of these
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Question # 26
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Question # 27
Fundamental law is
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Question # 28
cos2a=______;
Choose an answer
cos2 a-sin2 a
2cos2 a-1
1-2 sin2 a
All of these
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Question # 29
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Question # 30
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Question # 31
cos (180° -
θ
)=
Choose an answer
sin
θ
- cos
θ
- sin
θ
None of above
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