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Mathematics ECAT Pre Engineering Chapter 12 Trigonometric Functions and Identities Online Test MCQs With Answers
Question # 1
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Question # 2
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Question # 3
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1
-1
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Question # 4
Which one is a pair of allied angles
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(180° -
θ)
(180° -
θ,
180° +
θ)
(180° +
θ)
None of these
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Question # 5
Tan 2
θ=
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Question # 6
sin
α=
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2 sin
α
cos
α
2 sin
α
cos
β
2 sin
α
/2 cos
α
/2
1+ tan
2
α
/2
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Question # 7
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Question # 8
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Question # 9
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Question # 10
tan
θ
/2
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Question # 11
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Question # 12
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Question # 13
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-sin
θ
cos
θ
sin
θ
-cos
θ
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Question # 14
Fundamental law is
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Question # 15
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Question # 16
2cos2 a/2 =______;
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1+sina
1-sina
1+cosa
1-cosa
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Question # 17
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Question # 18
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Question # 19
cos (
α
-
β
) = cos
α
cos
β
+ sin
α
sin
β
is true for all
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α
>
β
> 0
α
>
β
β
>
α
None of these
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Question # 20
tan (-135°) = ______
θ
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0
1
2
3
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Question # 21
Cos (
α
+
β
) - cos (
α
-
β
) =
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-2 sin
α
sin
β
2 sin
α
cos
β
-2 sin
α
cos
α
4 sin
α
cos
β
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Question # 22
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Question # 23
sin 2
α
=
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Question # 24
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Question # 25
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Question # 26
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Question # 27
sin (
α
+
β
) + sin (
α
-
β
)
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2 sin
α
cos
β
sin (2
α
β)
sin
α
cos
α
None of these
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Question # 28
sin (
α
+
β
) - sin (
α -
β
) =
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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 # 29
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Question # 30
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