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Mathematics ECAT Pre Engineering Chapter 16 Solution of Trigonometric Equations Online Test MCQs With Answers
Question # 1
cot
θ
= sin 2
θ
if
θ
=
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Question # 2
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7
5
6
None of these
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Question # 3
If sin 6
θ
+ sin 4
θ
+ sin 2
θ
, then
θ
=
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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
The solution set of sin x + cos x = 0 is
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Question # 6
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trigonometric equation
conditional equation
identity
None
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Question # 7
The solution of the equation 3 tan
2
x = 1 is ____________
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none of these
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Question # 8
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none of these
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Question # 9
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 # 10
The smallest positive root of the equation tan x - x = 0 lies on
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Question # 11
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1
2
3
None of these
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Question # 12
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30°
45°
60°
75°
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Question # 13
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Question # 14
The solution of the equation cos
2
θ
+ sin
θ
+ 1 = 0 lies in the interval
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Question # 15
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Question # 16
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 # 17
The general solution of tan 3x = 1 is
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Question # 18
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Question # 19
If Sin A = sin B, cos A = cos B, then the value of A in terms of B is
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Question # 20
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 # 21
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none of these
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Question # 22
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none of these
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Question # 23
The solution set of the equation 1 + Cos x = 0 is __________
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none of these
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Question # 24
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No solution
One real solution
More than one real solution
None of these
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Question # 25
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none of these
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Question # 26
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both a & c
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Question # 27
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