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Chapter 3: Trigonometry
- Online Test
Chapter 3: Trigonometry
TEST : 2
# Chapter 3: Trigonometry
# TN 11th Maths
Prepare / Learn
Q1.
A.
sinA + sinB + sinC
B.
1
C.
0
D.
cosA + cosB + cosC
View Solution
Add Work Space
Answer :
Option C
Explaination / Solution:
# Chapter 3: Trigonometry
# TN 11th Maths
Prepare / Learn
Q2.
If cos pθ + cos qθ = 0 and if p ≠ q, then θ is equal to (n is any integer)
A.
B.
C.
D.
View Solution
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Answer :
Option B
Explaination / Solution:
# Chapter 3: Trigonometry
# TN 11th Maths
Prepare / Learn
Q3.
If tanα and tanβ are the roots of x
2
+ ax + b = 0, then
is equal to
A.
b/a
B.
a/b
C.
–a/b
D.
–b/a
View Solution
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Answer :
Option C
Explaination / Solution:
# Chapter 3: Trigonometry
# TN 11th Maths
Prepare / Learn
Q4.
In a triangle ABC, sin
2
A + sin
2
B + sin
2
C = 2, then the triangle is
A.
equilateral triangle
B.
isosceles triangle
C.
right triangle
D.
scalene triangle
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Answer :
Option C
Explaination / Solution:
# Chapter 3: Trigonometry
# TN 11th Maths
Prepare / Learn
Q5.
If
f
(θ) = |sin θ| + |cosθ| , θ
∊
R, then
f
(θ) is in the interval
A.
[0, 2]
B.
[1,√2]
C.
[1, 2]
D.
[0, 1]
View Solution
Add Work Space
Answer :
Option B
Explaination / Solution:
# Chapter 3: Trigonometry
# TN 11th Maths
Prepare / Learn
Q6.
cos 6x + 6 cos 4x + 15 cos 2x + 10 / cos 5x + 5 cos 3x + 10 cos x is equal to
A.
cos2x
B.
cos x
C.
cos 3x
D.
2 cos x
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Answer :
Option D
Explaination / Solution:
# Chapter 3: Trigonometry
# TN 11th Maths
Prepare / Learn
Q7.
The triangle of maximum area with constant perimeter 12m
A.
is an equilateral triangle with side 4m
B.
is an isosceles triangle with sides 2m, 5m, 5m
C.
is a triangle with sides 3m, 4m, 5m
D.
Does not exist
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Answer :
Option A
Explaination / Solution:
# Chapter 3: Trigonometry
# TN 11th Maths
Prepare / Learn
Q8.
A wheel is spinning at 2 radians/second. How many seconds will it take to make 10 complete rotations?
A.
10π seconds
B.
20 π seconds
C.
5 π seconds
D.
15π seconds
View Solution
Add Work Space
Answer :
Option A
Explaination / Solution:
# Chapter 3: Trigonometry
# TN 11th Maths
Prepare / Learn
Q9.
If sinα + cosα = b, then sin 2α is equal to
A.
b
2
-
1, if b ≤ √2
B.
b
2
-
1, if b > √2
C.
b
2
-
1, if b ≥ 1
D.
b
2
-
1, if b ≥√2
View Solution
Add Work Space
Answer :
Option A
Explaination / Solution:
# Chapter 3: Trigonometry
# TN 11th Maths
Prepare / Learn
Q10.
In a ∆ABC, if
(i) sin A/2 sin B/2 sin C/2> 0
(ii) sinAsinB sinC > 0 then
A.
Both (i) and (ii) are true
B.
Only (i) is true
C.
Only (ii) is true
D.
Neither (i) nor (ii) is true
View Solution
Add Work Space
Answer :
Option A
Explaination / Solution:
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