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ECAT Pre General Science Mathematics Chapter 16 Solution of Trigonometric Equations Online Test MCQs With Answers
Question # 1
Considering Cosine Rule of any triangle ABC, possible measures of angle A includes
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Angle A is obtuse
Angle A is acute
Angle A is right-angle
All of above
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Question # 2
For Cosine Rule of any triangle ABC, b
2
is equal to
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a
2
- c
2
+ 2ab cos A
a
3
+ c
3
- 3ab cos A
a
2
+ c
2
- 2ac cos B
a
2
- c
2
4bc cos A
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Question # 3
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all
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Question # 4
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Question # 5
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1
2
3
None of these
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Question # 6
The solution set of sin x + cos x = 0 is
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Question # 7
The solution set of trigonometric equation contains
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one element
two elements
three elements
Infinite elements
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Question # 8
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30°
45°
60°
75°
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Question # 9
If sin 6
θ
+ sin 4
θ
+ sin 2
θ
, then
θ
=
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Question # 10
The solution of the equation cos
2
θ
+ sin
θ
+ 1 = 0 lies in the interval
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Question # 11
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Question # 12
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Question # 13
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7
5
6
None of these
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Question # 14
By expressing sin 125° in terms of trigonometrical ratios, answer will be
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sin 65° = 0.9128
sin 55° = 0.8192
sin 70° = 0.5384
sin 72° = 0.1982
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Question # 15
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none of these
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Question # 16
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A finite non-empty set
Null set
Both a and b
None of these
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Question # 17
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I and
I
I quadrants
I
I and
I
I
I quadrants
I
I
I and
I
V
quadrants
none of these
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Question # 18
cot
θ
= sin 2
θ
if
θ
=
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Question # 19
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From an empty set
1
2
>2
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Question # 20
The general value of
θ
satisfying the equation 2 sin
2
θ
- 3 sin
θ
-2 = 0 is
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Question # 21
The solution set of the equation 1 + Cos x = 0 is __________
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none of these
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Question # 22
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Question # 23
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Question # 24
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none of these
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Question # 25
If Sin A = sin B, cos A = cos B, then the value of A in terms of B is
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Question # 26
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both a & c
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Question # 27
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