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Online Tests
ECAT Pre General Science Mathematics Chapter 12 Trigonometric Functions and Identities Online Test MCQs With Answers
Question # 1
sin (
α +
β)=
Choose an answer
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 # 2
cos 2
α=
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1 - 2 sin
2
α
sin
2
α
+ cos
2
β
sin
2
α
- cos
2
β
None of these
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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
sin 540° =
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0
1
2
3
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Question # 8
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Question # 9
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 # 10
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Question # 11
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Question # 12
sin 3a = ______;
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3sin a - 4sin3a
4sin a -3 sin3 a
3 cos3 a -cosa
4cos3 a - 3cos a
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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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1
-1
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Question # 17
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Question # 18
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Question # 19
In any triangle ABC,with usual notationαsinβ =____;
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b sinα
bsinβ
αsinα
None of these
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Question # 20
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Question # 21
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Question # 22
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Question # 23
Tan(
α
-
β
)=
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Question # 24
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Question # 25
With usual notations b2 = a2 + c2 -2ac cos is called______;
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None of these
Law of sines
Law of consines
Law of tangents
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Question # 26
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Question # 27
sin 2
α
=
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Question # 28
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