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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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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
The law of cosines reduces to a2 +c2 =b2 for
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α = 90°
β = 90°
γ = 90°
α +β +γ =180°
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Question # 9
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Question # 10
In any triangle ABC,with usual notationαsinβ =____;
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b sinα
bsinβ
αsinα
None of these
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Question # 11
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Question # 12
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Question # 13
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quadrant I
quadrant II
quadrant III
quadrant IV
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Question # 14
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Question # 15
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Question # 16
sin 540° =
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0
1
2
3
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Question # 17
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Question # 18
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Question # 19
Distance between A(3, 8), B(5, 6) is
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Question # 20
sin (
α -
β
)=
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sin
α
cos
β
- cos
α
sin
β
sin
α
cos
β
+ cos
α
sin
β
sin
α
cos
α
- cos
β
sin
β
sin
α
cos
α
- cos
β
sin
β
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Question # 21
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 # 22
sin 2
α
=
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Question # 23
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Question # 24
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Question # 25
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 # 26
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-sin
θ
cos
θ
sin
θ
-cos
θ
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Question # 27
cos
θ/2=
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Question # 28
cos 2
α=
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sin
2
α
+ cos
2
α
-cos
θ
tan
θ
None of these
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Question # 29
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Question # 30
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Question # 31
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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