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Mathematics ECAT Pre Engineering Chapter 12 Trigonometric Functions and Identities Online Test MCQs With Answers
Question # 1
sin 2
α
=
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Question # 2
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Question # 3
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 # 4
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 # 5
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Question # 6
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Question # 7
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Question # 8
Tan(
α
-
β
)=
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Question # 9
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Question # 10
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Question # 11
Fundamental law is
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Question # 12
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Question # 13
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Question # 14
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Question # 15
sin (2
π
-
θ
)
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cos
θ
sin
θ
tan
θ
-sin
θ
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Question # 16
If cos
α
= 4/5, then cos
α
/2
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Question # 17
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1
2
-2
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Question # 18
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Question # 19
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Question # 20
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Question # 21
tan
θ
/2
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Question # 22
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Question # 23
sin 540° =
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0
1
2
3
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Question # 24
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Question # 25
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 # 26
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Question # 27
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1
-1
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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
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