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Mathematics ECAT Pre Engineering Chapter 16 Solution of Trigonometric Equations Online Test MCQs With Answers
Question # 1
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Question # 2
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Question # 3
The solution set of trigonometric equation contains
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one element
two elements
three elements
Infinite elements
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Question # 4
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No solution
One real solution
More than one real solution
None of these
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Question # 5
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7
5
6
None of these
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Question # 6
By expressing cos 113° in terms of trigonometrical ratios, answer will be
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− cos 76° = -0.7093
− cos 65° = -0.4258
− cos 67° = -0.3907
− cos 62° = -0.8520
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Question # 7
The general solution of tan 3x = 1 is
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Question # 8
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Question # 9
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none of these
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Question # 10
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Question # 11
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Question # 12
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none of these
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Question # 13
cot
θ
= sin 2
θ
if
θ
=
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Question # 14
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 # 15
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Question # 16
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Question # 17
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1
2
3
None of these
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Question # 18
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 # 19
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 # 20
The solution of the equation 3 tan
2
x = 1 is ____________
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none of these
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Question # 21
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30°
45°
60°
75°
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Question # 22
If sin 6
θ
+ sin 4
θ
+ sin 2
θ
, then
θ
=
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Question # 23
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Question # 24
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 # 25
The solution set of the equation 1 + Cos x = 0 is __________
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none of these
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Question # 26
cot
θ
= sin 2
θ
if
θ
=
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Question # 27
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 # 28
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 # 29
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all
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Question # 30
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none of these
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