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Mathematics ECAT Pre Engineering Chapter 12 Trigonometric Functions and Identities Online Test MCQs With Answers
Question # 1
cos 2
α=
Choose an answer
sin
2
α
+ cos
2
α
-cos
θ
tan
θ
None of these
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Question # 2
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 # 3
sin
2
α
cos
2
α
=
Choose an answer
-1
0
1
None of these
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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
cos2a=______;
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cos2 a-sin2 a
2cos2 a-1
1-2 sin2 a
All of these
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Question # 9
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Question # 10
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Question # 11
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Question # 12
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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
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Question # 19
2cos2 a/2 =______;
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1+sina
1-sina
1+cosa
1-cosa
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Question # 20
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Question # 21
If ΔABC is right triangle then the law of Cosines reduces to
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The Pythagoras Theorem
The law of Sines
The law of cosines
The law of tangents
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Question # 22
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Question # 23
Express as a sum or difference: 2 sin 5
θ
cos
θ
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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
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Question # 25
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Question # 26
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Question # 27
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Question # 28
Fundamental law is
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Question # 29
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Question # 30
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Question # 31
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