cbse class 12 math question paper

Time allowed: 180 min Marks: 100
(10 x 1 mark = 10 marks)
1) What is the angle between following planes and
?
2) What is the area of the parallelogram having diagonals
?
3)
If what is ?
4)
Given Express in terms of A?
5) What does reduce to?
6)
If then find the value of x,y,z and w
7) If A,B and C are angles of a triangle ,then the determinant
8) Integrate the function
9) Let be given by
. Write down .
10) Choose the correct answer. The planes: 2x – y + 4z = 5 and 5x – 2.5y + 10z
= 6 are:
Clay6.com CBSE XII Math Model Paper
PRACTICE TEST-1 FEB-01-14 - Practice T est f or CBSE-2014 Board Exams
General Instructions
The question paper consists of 3 parts. Each question of each part is
compulsory.
SEC-A: (10 questions) Questions 1 to 10 are of 1 mark(s) each
SEC-B: (12 questions) Questions 11 to 22 are of 4 mark(s) each
SEC-C: (7 questions) Questions 23 to 29 are of 6 mark(s) each
Links to individual answers on clay6.com have also been provided.
SEC-A
2x − 3y + 4z = 1
−x + y = 4
3 + − 2 and − 3 + 4i¯ j¯ k¯ i¯ j¯ k¯
= xy,ex+y dy
dx
A =
⎡
⎣
3
2
0
−3
−3
−1
4
4
1
⎤
⎦
A−1
co + cos−1 4
5
s−1 12
13
[ ] = [ ]
xy
z + 6
4
x + y
8
0
w
6
is equal to
∣
∣
∣
∣
1
cosC
cosB
cosC
1
cosA
cosB
cosA
1
∣
∣
∣
∣
(ex 1
x − )1
x2
f : {1, 3, 4} → {1, 2, 5}and g : {1, 2, 5} → {1, 3}
f = {(1, 2), (3, 5), (4, 1)} and g = {(1, 3), (2, 3), (5, 1)} gof

11) By using the properties of definite integrals,evaluate the integral
12)
If are all distinct and then the value of is
13) Suppose you roll 5 dice and sum up the highest 3 numbers. What is the
probability that the sum is 18?
14) If is a binary operation on the set defined as
then draw the composition table for the operation and find the identity
element and inverse of if exists.
15)
If , what is the value of
16) Let be three vectors such that and each
one of them being perpendicular to sum of the other two, find
17) Solve:
18) Find the equation of a curve passing through the point (1,1).If the tangent
drawn at any point P(x,y) on the curve meets the coordinate axes at A and B
such that P is the mid-point of AB.
19)
Find the values of p and q so that is
differentiable at
20)
Find the shortest distance between the lines: and
21) Find the particular solution satisfying the given condition
SEC-B
∣ x + 2 ∣ dx∫
−10
10
x, y, z = 0
∣
∣
∣
∣
x
y
z
x2
y2
z2
1 + x3
1 + y3
1 + z3
∣
∣
∣
∣
−1
xyz
∗ {0, 1, 2, 3, 4, 5}
a ∗ b = {
a + b,
a + b − 6,
if a+b < 6
if a+b ≥ 6
4
x = , y =asi tn−1
− −−−−−
√ aco ts−1
− −−−−−
√ dy
dx
, , anda¯ b¯ c¯ | | = 3, | | = 4, | | = 5a¯ b¯ c¯
| + + |a¯ b¯ c¯
sin⌊2 {cot(2 x)}⌋ = 0cos−1 tan−1
f(x) = {
+ 3x + p,x2
qx + 2,
if x ≤ 1
if x > 1
x = 1.
= =x+1
7
y+1
−6
z+1
1
= =x−3
1
y−5
−2
z−7
1
2xy + − 2y2 x2 dy
dx
= 0; y = 2 when x = 1

22) A rectangular sheet of tin 45 cm by 24 cm is to be made into a box without
top, by cutting off square from each corner and folding up the flaps. What
should be the side of the square in cms to be cut off so that the volume of
the box is maximum ?
23)
Evaluate:
24)
Use product to solve the system of
equations :
25) If the sum of the surface areas of cube and a sphere is constant.What is the
ratio of an edge of the cube to the diameter of the sphere,when the sum of
their volumes is minimum?
26) A company manufactures two types of sweaters :type A sweaters type B.It
costs Rs 360 to make a type A sweater and Rs 120 to make a type B
sweater.The company can make at most 300 sweaters and spend at most
Rs72,000 a day.The number of sweaters of type B cannot exceed the number
of sweaters of type A by more than 100.The company makes a profit of Rs
200 for each sweater of type A and Rs 120 for every sweater of type B.What
is the maximum profit (in Rs.)?
27) Find the equation of the plane which is perpendicular to the plane
and which contains the line of intersection of the
planes and
28) Find the area of the region
29) Assume that the chances of a patient having a heart attack is 40%. It is also
assumed that a meditation and yoga course reduce the risk of heart attack
by 30% and prescription of certain drug reduces its chances by 25%. At a
time a patient can choose any one of the two options with equal
probabilities. It is given that after going through one of the two options the
patient selected at random suffers a heart attack. Find the probability that
the patient followed a course of meditation and yoga?
SEC-C
|xsin πx| dx∫
−1
3/2
⎡
⎣
1
0
3
−1
2
−2
2
−3
4
⎤
⎦
⎡
⎣
−2
9
6
0
2
1
1
−3
−2
⎤
⎦
x − y + 2z = 1
2y = 3z = 1
3x − 2y + 4z = 2
5x + 3y + 6z + 8 = 0
x + 2y + 3z − 4 = 0 2x + y − z + 5 = 0.
(x, y) : ≤ 4x, 4 + 4 ≤ 9y2 x2 y2

Q No. Correct Answer Full answer
1 View
2 View
3
(A)
View
4 (D) View
5 View
6 x = 2 or 4 y = 2 or 4 z = -6 w = 4 View
7 (A) 0 View
8 View
9 View
10 parallel View
11 View
12 View
13 View
14 is identity and inverse of 4 is 2 View
15 View
16 View
17 View
18 View
19 View
20 View
21 View
22 5 cm View
23 View
24 View
25 A : 1 : 1 View
26 (B) 48000 View
27 View
28
sq.units.
View
29 View
Answer key
cos−1 −5
58√
5 3
−
√
y(1−x)
x(y−1)
A3
cos−1 33
65
ex
x +c
gof = {(1,3),(3,1),(4,3)}
0
−
y
x
5 2√
−1 ± 2√
(D) xy = 1
(A) p = 3,q = 5
2 92√
(B) y[logx − 1] + 2x = 0
+3
π
1
π2
(C) 0,5,3
51x + 15y − 50z + 173 = 0
+ − ( )
2√
6
9π
8
9
4
sin−1 1
3
14
29

cbse class 12 math question paper

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cbse class 12 math question paper