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ECAT Mathematics Chapter 12 Trigonometric Functions and Identities Online Test MCQs With Answers
Question # 1
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Question # 2
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Question # 3
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Question # 4
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Question # 5
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 # 6
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Question # 7
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 # 8
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Question # 9
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Question # 10
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Question # 11
Tan(
α
-
β
)=
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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
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Question # 20
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Question # 21
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Question # 22
tan (-135°) = ______
θ
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0
1
2
3
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Question # 23
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Question # 24
2cos2 a/2 =______;
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1+sina
1-sina
1+cosa
1-cosa
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Question # 25
cos
θ/2=
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Question # 26
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Question # 27
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Question # 28
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Question # 29
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 # 30
sin
α=
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2 sin
α
cos
α
2 sin
α
cos
β
2 sin
α
/2 cos
α
/2
1+ tan
2
α
/2
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