T 4
T 4
NDA _4_ math_(1-120) Hindi and French but not English. 23 students
Q.1 What is the angle between the lines whose di- learn only Hindi and 17 students learn only En-
rection cosine are proportional to (2,3,4) and (1,- glish. The total number of stduendent learning
2,1) respectively? French is 46 and the total number of student
(a) 90° (b) 60° leaning only French is 11.
(c) 45° (d) 30° 6. How many students learn precisely two lan-
2. What is the value of k for which the following guages?
function f(x) is continuous for all x? (a) 35 (b) 40
(c) 30 (d) 13
x 3 3 x 2 7. How many students learn at least two lan-
, for x 1 guages?
f x x 1
2
(a) 15 (b) 30
k , for x 1 (c) 45 (d) 55
8. What is the total stregth of the class?
for x
(a) 124 (b) 100
(a) 3 (b) 2
(c) 96 (d) 66
(c) 1 (d) -1
9. How many students learn English and French?
3. If p, q and r are rational numbers, then the roots
(a) 30 (b) 43
of the equation
(c) 45 (d) 66
x 2 2 px p 2 q 2 2qr r 2 0 are 10. How many students learn at least one languages?
(a) Complex (b) Pure imaginary (a) 45 (d) 51
(c) Irrational (d) Rational (c) 96 (d) None of these
4. If A 1, 2,5, 6 and B 1, 2,3 , then what 11. What is middle term in the expansion of
is A × B B × A is equal to x
8
1 ?
(a) 1,1 ,(2,1), 6,1 , 3, 2 2
5. What is the differential equation of all parabolas 12. What isthe sum of roots of the equations
2 3 x 7 4 3 x 2 3 0 ?
whose axed are parallel to Y-axis? 2
2
3
d y d x
(a) 0 (b) 0 (a) 2 3 (b) 2 3
dx3 dy 2
(c) 7 4 3 (d) 4
d 3x d3y
(c) 1 (d) c 13. What is the total number of combinations of n
dy 3 dx 3 different things taken 1,2,3,.....,n at time?
Direction (Q.6-10)-Read the following passage (a) 2n+1 (b) 22n-1
an give answer. (c) 2n-1
(d) 2n-1
The students of a class are offered three lan- 14. One of the roots of the quadratic equation
guages (Hindi, English and French). 15 students
ax 2 bx c 0 , a 0 is positve and the or-
learn all the three languages whereas 28 stu-
der root is negative. the conditon for this to hap-
dents do no tlearn anuy language. The number
pen is ___
of students learning Hindi and Englsih but no
Fech is twice the number of students learning (a) a 0, b 0, c 0
Hindi and French but not English, The number (b) a 0, b 0, c 0
of student is learning English and French but
Hindi is thrice the number of students learning (c) a 0, b 0, c 0
1 k?
log a a 2 1 log equal
a a2 1 1
(a) 3 (b)
to? 3
(a) 1 (b) 2 1
(c) 2 (d)
1 2
(c) 2 (d)
2 26. What is the value of the determinant
21. 5 books ar to be chosen form a lot of 10 books.
If m is the numebr of sways of choice when x 1 x 2 x 4
one specified book is always included and n is x3 x5 x8
?
the number of ways of choice when a speficied x 3 x 10 x 14
book is always excluded, then which one of the
following is correct? (a) x 2 (v) x 2 2
(a) m n (b) m n (c) 21 (d) -2
(c) m n 1 (d) m n 2 27. Consider the following statements in respect of
22. Which one of the following is correct in
the function f x x 1, x 1,1
3
f x /2
f cos x dx
I. is increasing in 1,1 (a) 0 (b) 0
3 1 1 1 5 19
59. A and B , then which of (a) (b)
0 4 0 2 2 9
the following is/are correct? 5 11
I. AB is defined. (c) (d)
II. BA is define 4 3
III. Ab = BA 67. Which one of the following options is correct?
Select the correct answer using the codes given (a) sin 2 30,sin 2 45,sin 2 60 are in Gp
below.
(a) Only I (b) Only II (b) sin 2 30, cos 2 45, cos 2 60 are in Gp
(c) Both I and II (d) I, II and III (c) sin 2 30, cot 2 45, cot 2 60 are in Gp
60. Using the digits 1,2,3,4 and 5 only once, how
many numbers greater than 41000 can be (d) tan 2 30, tan 2 45, tan 2 60 are in Gp
formed? 68. If sum of squares of the roots of the equation
(a) 41 (b) 48
(c) 50 (d) 55 x 2 kx b 0 is 2b, what is k equal to?
61. If an angle is divide into two parts A and B (a) 1 (b) b
such that A - B = x and tan A ; tan B = 2 : 1, (c) -b (d) 0
then what is sinx equal to 69. If one root of the equation ax 2 bx c 0 ,
(a) 3sin (b) 2 sin / 3 a 0 is reciprocal of the other root, then which
one of the following is correct?
(c) sin / 3 (d) 2sin (a) a c (b) b c
62. A man standing on the bank of a river serves (c) a c (d) b 0
that the angle of elevation of the top of a tree 70. If is the imaginary cube root of unity, then
just on the opposite bank is 60°. The angle of
27
elevationis 30° from a point at a point at a dis- what is 2 2 2 equal to?
tance ym from the bank. What is the height of
the tree? (a) 327 ω (b) 327 ω
(a) ym (b) 2ym (c) 327 (d) 327
3y y 71. What is the acute angle between the planes
(c) m (d) m
2 2 x y 2 z 3 and 2 x y z 11 ?
63. If P, Q and R at three non-collinear points, then (a) / 5 (b) / 4
what is PQ PR equal to? (c) / 6 (d) / 3
(a) Null set (b) { P } 72. What is the area bounded by the curves y = ex ,
(c) {P,Q,R} (d) {Q,R} y = e-x and the straight line x = 1?
64. A,B,C,D and E are coplanar points and three of
them lie in a straight line. What is the maximum 1 1
number of triangles that can be drawn with these (a) e sq unit (b) e sq unit
e e
points as their vertices?
(a) 5 (b) 9 1 1
(c) 10 (d) 12 (c) e 2 sq unit (d) e 2 sq unit
e e
(b) 0, 2 and 0, 2 2 x 1 1
81. If the matrix A
1 3 x 0 is singu-
(c) 0,3 and 0, 3
1 3 x
(d) No such point exists
74. What is the locus of a point which moves equi- lar, then what is the solution set S?
distant from the coordinate axes?
(a) S 0, 2,3 (b) S 1, 2,3
(a) x y 0 (b) x 2 y 0
(c) 2 x y 0 (d) None of these (c) S 1, 2, 3 (d) S 2,3
(c) n / n 1 (d) 1 / n 2
110. What is lim
x
a 2 x 2 ax 1 a 2 x 2 1
102. what is the equation of the line joining the origin equal to?
with the point of intersection of the lines 1
4 x 3 y 12 and only 13 x 4 y 12 ? (a) (b) 1
2
(a) x y 1 (b) x y 1 (c) 2 (d) 0
(c) 3 x 4 y (d) x y sin x
103. If the sum of the squares of the distancee of the 111. What is x
dx equal to?
1 1
(c) (d)
2 3
115. What is the solution set for the equation
x 4 26 x 2 25 0 ?
(a) 5, 1,1, 5 (b) 5, 1
x x2
x2
(a) K (b) K
2 2 2 2
x x 2
x2
(c) K (d) K
2 2 2 2
117. If and are the roots of the equation
4 x 2 3 x 7 0 , then what is the value of
2
2 ?
(a) 47 / 49 (b) 49 / 47
(c) 47 / 49 (d) 49 / 47
118. What is the equation of the line passing through
(2, -3) and parallel to Y-axis?
(a) Y = -3 (b) Y = 2
(c) X = 2 (d) X = -3
119. What is the set of points (x, y) satisfying the
equations x 2 y 2 4 and x y 32 ?
(c) 0, 2 , 2,0