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ECAT Pre General Science Mathematics Chapter 12 Trigonometric Functions and Identities Online Test MCQs With Answers
Question # 1
The law of cosines reduces to a2 +c2 =b2 for
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α = 90°
β = 90°
γ = 90°
α +β +γ =180°
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Question # 2
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 # 3
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quadrant I
quadrant II
quadrant III
quadrant IV
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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
If cos
α
= 4/5, then cos
α
/2
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Question # 9
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Question # 10
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 # 11
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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
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 # 18
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Question # 19
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Question # 20
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Question # 21
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 # 22
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-sin
θ
cos
θ
sin
θ
-cos
θ
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Question # 23
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Question # 24
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Question # 25
cos2a=______;
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cos2 a-sin2 a
2cos2 a-1
1-2 sin2 a
All of these
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Question # 26
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Question # 27
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Question # 28
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