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ECAT Mathematics Chapter 16 Solution of Trigonometric Functions Online Test MCQs With Answers
Question # 1
General solution of 1 + cos x = 0 is
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Question # 2
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Question # 3
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Question # 4
The number of values of x in the interval [0, 5
π
] satisfying the equation 3 sin
2
x - 7 sinx + 2 = 0 is
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0
5
6
10
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Question # 5
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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Question # 6
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Question # 7
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From an empty set
1
2
>2
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Question # 8
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Question # 9
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 # 10
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both a & c
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Question # 11
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Question # 12
One root of the equation cos x - x + 1/2 = 0 lies in the interval
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Question # 13
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 # 14
The solution of the equation 3 tan
2
x = 1 is ____________
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none of these
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Question # 15
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Question # 16
The general value of
θ
satisfying the equation 2 sin
2
θ
- 3 sin
θ
-2 = 0 is
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Question # 17
cot
θ
= sin 2
θ
if
θ
=
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Question # 18
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none of these
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Question # 19
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 # 20
The solution of the equation cos
2
θ
+ sin
θ
+ 1 = 0 lies in the interval
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Question # 21
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Question # 22
Sine rule for a triangle states that
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a/sin A = b/sin B = c/sin C
sin A/a = sin B/b = sin C/c
a/sin A + b/sin B + c/sin C
2a/sin A = 2b/sin B = 2c/sin C
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Question # 23
The number of points of intersection of two curves y = 2 sin x and y = 5x
2
+ 2x + 3 is
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0
1
2
None of these
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Question # 24
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trigonometric equation
conditional equation
identity
None
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Question # 25
If sin 6
θ
+ sin 4
θ
+ sin 2
θ
, then
θ
=
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Question # 26
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Question # 27
If sin (
π
cos
θ
) = cos (
π
sin
θ
), then which of the following is correct?
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