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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 =____;
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b sinα
bsinβ
αsinα
None of these
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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
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Question # 9
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Question # 10
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 # 11
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Question # 12
cos 3a =_______;
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3sin a - 4sin3 a
4sin a - 3sin3 a
3cos3 a - 4cos a
4cos3a - 3cos a
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Question # 13
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Question # 14
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Question # 15
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 # 16
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Question # 17
sec (-360°) = ______
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0
1
2
3
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Question # 18
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Question # 19
cos
θ/2=
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Question # 20
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Question # 21
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Question # 22
Distance between A(3, 8), B(5, 6) is
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Question # 23
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1
-1
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Question # 24
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Question # 25
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Question # 26
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Question # 27
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 # 28
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Question # 29
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quadrant I
quadrant II
quadrant III
quadrant IV
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Question # 30
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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