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ECAT Mathematics 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
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1
-1
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Question # 4
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Question # 5
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Question # 6
sin
2
α
cos
2
α
=
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-1
0
1
None of these
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Question # 7
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Question # 8
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Question # 9
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Question # 10
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Question # 11
sec (-360°) = ______
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0
1
2
3
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Question # 12
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Question # 13
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 # 14
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Question # 15
If cos
α
= 4/5, then cos
α
/2
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Question # 16
sin (
α
+
β
) + sin (
α
-
β
)
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2 sin
α
cos
β
sin (2
α
β)
sin
α
cos
α
None of these
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Question # 17
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Question # 18
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Question # 19
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Question # 20
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Question # 21
cos (180° -
θ
)=
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sin
θ
- cos
θ
- sin
θ
None of above
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Question # 22
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Question # 23
Fundamental law is
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Question # 24
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Question # 25
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Question # 26
Cos (
α
+
β
) - cos (
α
-
β
) =
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-2 sin
α
sin
β
2 sin
α
cos
β
-2 sin
α
cos
α
4 sin
α
cos
β
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Question # 27
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 # 28
cos
4
θ
- sin
4
θ
=
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cos4
θ
cos2
θ
-sin
θ
sin2
θ
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Question # 29
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Question # 30
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Question # 31
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