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CBSE
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MCQ Questions for CBSE Class 12 with Answers
MCQ Questions for CBSE Class 11 with Answers
MCQ Questions for CBSE Class 10 with Answers
MCQ Questions for CBSE Class 9 with Answers
MCQ Questions for CBSE Class 8 with Answers
MCQ Questions for CBSE Class 7 with Answers
MCQ Questions for CBSE Class 6 with Answers
MCQ Questions for CBSE Class 5 with Answers
MCQ Questions for CBSE Class 4 with Answers
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MCQ Questions for CBSE Class 2 with Answers
MCQ Questions for CBSE Class 1 with Answers
Quiz
CBSE
/
Class 12
/
Maths
/
Determinants
1.
If Δ =
[
10
2
30
6
]
then A =
0
10
12
60
2.
A =
[
α
q
q
α
]
|A³| = 125 then α =
±3
±2
±5
0
3.
The area of a triangle with vertices (-3, 0) (3, 0) and (0, k) is 9 sq. units. The value of k will be
9
3
-9
6
4.
Let f(t) =
[
c
o
t
t
t
1
2
s
i
n
t
t
2
t
s
i
n
t
t
t
]
then
l
i
m
t
→
0
f
(
t
)
t
2
is equal to
0
-1
2
3
5.
If A and B are invertible matrices, then which of the following is not correct?
adj A = |A|.A
det (a)= [det (a)]
(AB)= BA
(A + B)= B+ A
6.
If x, y, z are all different from zero and
7.
Evaluate the determinant Δ =
|
l
o
g
3
512
l
o
g
4
3
l
o
g
3
8
l
o
g
4
9
|
15
2
12
14
3
6
8.
|
x
−
7
x
5
x
+
1
|
3x² + 4
x(5x + 8)
3x + 4x²
x(3x + 4)
9.
|
cos
θ
−
sin
θ
sin
θ
cos
α
|
0
1
2
3
10.
|
cos
15
∘
sin
15
∘
sin
75
∘
cos
75
∘
|
0
5
3
7
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