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JEE Questions for Maths Properties Of Triangle Quiz 1 - MCQExams.com
JEE
Maths
Properties Of Triangle
Quiz 1
In any ∆ABC, c
2
sin 2B + b
2
sin 2C is equal to
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0%
∆/2
0%
∆
0%
2∆
0%
3∆
0%
4∆
In a triangle, the lengths of two larger sides are 10 cm and 9 cm. If the angles of the triangle are in AP, then the length of the third side is
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0%
√5 - √6
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√5 + √6
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√5 ± √6
0%
5 ± √6
If the bisector of the angle P of a triangle PQR meets QR in S, then
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QS = SR
0%
QS : SR = PR : PQ
0%
QS : SR = PQ : PR
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None of these
In a ∆ABC, a,b, c are the sides of the triangle opposite to the angles A, B, C, respectively. Then, the value of a
3
sin (B - C) + b
3
(C - A) + c
3
(A - B) is
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0
0%
1
0%
3
0%
2
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sin2 B
0%
cos2 A
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cos2 B
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sin2 A
If the angles of a triangle are in the ratio 1 : 1 : 4, then the ratio of the perimeter of the triangle to its largest side is
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√2 + 2 : √3
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3 : 2
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√3 + 2 : √2
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√3 + 2 : √3
Angles A, B, C of a ∆ABC are in AP and b : c = √3 : √2, then ∠A is given by
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45o
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60o
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75o
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90o
If in a ∆ABC, a tan A + b tan B = (a + b) tan (A + B)/2 , then
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A = B = C
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C = A
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A = B
0%
B = C
a
3
cos (B - C) + b
3
cos (C - A) + c
3
cos (A - B) is equal to
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0%
3abc
0%
3 (a + b + c)
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abc (a + b + c)
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0
If in a ∆ABC , a/ cos A = b/ cos B, then
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sin2 A + sin2 B = sin2 C
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2 sin A cos B = sin C
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2 sin A sin B sin C = 1
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None of the above
If A + B + C = 180
o
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1
0%
cot A cos B cot C
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- 1
0%
0
The base BC of a ∆ABC is 6 cm and ∠B = 11 5
o
, ∠C = 2 5
o
, then its altitude is
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1.2cm
0%
6 cm
0%
1. 5 cm
0%
3 cm
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a2 - b2
0%
2)
0%
0%
a2 + b2
If in a ∆ABC, sin A, sin B, and sin C are in AP, then
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the radius are in AP
0%
the altitudes are in HP
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the angles are in AP
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the angles are in HP
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0%
2)
0%
0%
In a ∆ABC, a = 8 cm, h = 10 cm, c = 12 cm Then, relation between angles of the triangle is
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C = A + B
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C = 2B
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c = 2A
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c = 3A
If the angles A, B and C of a triangle are in an arithmetic progression and if a, b and c denote the lengths of the sides opposite to A,B and C respectively, then the value of the expression (a/c) sin 2C + (c/a) sin 2A is
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1/2
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√3/2
0%
1
0%
√3
If the sides of a right angled triangle from an AP, then the 'sin' of the acute angles are
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0%
0%
2)
0%
0%
The sides of a triangle are respectively 7 cm, 4√3 cm and √13 cm, then the smallest angle of triangle is
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π/6
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π/3
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π/4
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π/5
The area (in sq units) of the triangle whose sides are 6, 5, √13, is
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5√2
0%
9
0%
6√2
0%
11
0%
13
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1/24
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√3/24
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1/8
0%
1/√3
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5/12√3
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90o
0%
60o
0%
45o
0%
30o
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Both I and II are correct
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I is correct, II is incorrect
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I is incorrect , II is correct
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Both I and II are incorrect
If in a ∆ABC , a = 6 cm , b = 8 cm , c = 10 cm, then the value of sin 2A is
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0%
6/25
0%
8/25
0%
10/25
0%
24/25
If two angles of ∆ABC are 45
o
and 60
o
, then the ratio of the smallest and the greatest sides are
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0%
(√3 -: 1
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√3 : √2
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1 : √3
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√3 : 1
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0%
0%
2)
0%
0%
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1/5
0%
5/7
0%
19/35
0%
None of these
In ∆ABC, if (a + b + c) (a - b + c) = 3ac, then
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∠B = 60o
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∠B = 30o
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∠C = 60o
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∠A + ∠C = 90o
If in a ∆ ABC, a = 15, b = 36, c = 39, then sin C/2 is equal to
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√3/2
0%
1/2
0%
1/√2
0%
- (1/√2)
0%
- (1/2)
In a ∆ABC, if b + c = 2a and ∠A = 60
o
, then ∆ABC is
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equilateral
0%
right angled
0%
isosceles
0%
scalene
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