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ECAT Pre General Science Mathematics Chapter 16 Solution of Trigonometric Equations Online Test MCQs With Answers
Question # 1
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Question # 2
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 # 3
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Question # 4
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Question # 5
If 4 sin
2
θ
=1, then values of
θ
are
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Question # 6
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none of these
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Question # 7
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Question # 8
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Question # 9
If sin (
π
cos
θ
) = cos (
π
sin
θ
), then which of the following is correct?
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Question # 10
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Question # 11
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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 # 12
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all
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Question # 13
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 # 14
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none of these
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Question # 15
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From an empty set
1
2
>2
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Question # 16
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Question # 17
The solution set of the equation 4 cos
2
x - 3 + 0 is
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none of these
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Question # 18
The number of solution of the equation tan x + sec x = 2 cos x lying in the interval [0, 2
π
] is
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0
1
2
3
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Question # 19
The general solution of tan 3x = 1 is
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Question # 20
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I and
I
I quadrants
I
I and
I
I
I quadrants
I
I and
I
V
quadrants
none of these
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Question # 21
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Question # 22
One root of the equation cos x - x + 1/2 = 0 lies in the interval
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Question # 23
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A finite non-empty set
Null set
Both a and b
None of these
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Question # 24
The solution set of sin x + cos x = 0 is
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Question # 25
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Question # 26
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No solution
One real solution
More than one real solution
None of these
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Question # 27
In a triangle ABC, if angle A = 72° , angle B = 48° and c = 9 cm then Ĉ is
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69°
66°
60°
63°
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