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ECAT Mathematics Chapter 12 Trigonometric Functions and Identities Online Test MCQs With Answers
Question # 1
cos (
α
+
β
) + cos (
α
-
β
) =
Choose an answer
4 cos
α
cos
β
2 cos
α
cos
β
2 sin
α
sin
β
2 sin
α
cos
β
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Question # 2
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Question # 3
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Question # 4
2cos2 a/2 =______;
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1+sina
1-sina
1+cosa
1-cosa
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Question # 5
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Question # 6
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 # 7
cos 2
α=
Choose an answer
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 # 8
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Question # 9
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Question # 10
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Question # 11
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-sin
θ
cos
θ
sin
θ
-cos
θ
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Question # 12
sec (-360°) = ______
Choose an answer
0
1
2
3
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Question # 13
Let P(x
1
, y
1
) and Q(x
2
, y
2
) be two points in the co-ordinate plane. Let d = distance between P and Q
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Question # 14
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Question # 15
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 # 16
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Question # 17
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Question # 18
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Question # 19
If cos
α
= 4/5, then cos
α
/2
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Question # 20
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Question # 21
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Question # 22
cos
θ/2=
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Question # 23
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Question # 24
sin (
α +
β)=
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sin
α
cos
β
- cos
α
sin
β
sin
α
cos
β
- cos
α
sin
β
sin
α
cos
α
- cos
β
sin
β
sin
α
cos
α
+ cos
β
sin
β
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Question # 25
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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Question # 26
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 # 27
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Question # 28
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Question # 29
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Question # 30
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1
2
-2
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Question # 31
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