1. If ax + by = 6, bx – ay = 2 and x2
+ y2 = 4 , then the value of
(
a2 + b2 ) would be :
(a)
10
(b) 2
(c)
4
2. If x + 1/x = 4, then
x3 + 1/x3is :
(a)
64
(b) 32
(c)
52
(d) 16
3. If x + y = 1, then the value of x3
+ y3 + 3xy is :
(a)
0
(b) 1
(c)
3
(d) 5
4. If x = 99 , value of
x ( x2 + 3x + 3) is :
(a)
1000001
(b) 99999
(c)
999999
(d) 9999999
5. If ( y –z )3
+ ( z – x )3 + ( x – y )3 is equal to
(a) 3(y – z ) ( z + x
) ( y – x)
(b) ( x – y ) ( y + z
) ( x – z)
(c) 3 ( y –z ) ( z –
x) (x – y )
(d) ( y –z ) ( z –x )
( x – y )
6. If tan 2q. Tan 4q = 1 , then value of
tan3q is :
(a) 1/2
(b) 1
(c)
2/3
(d)
1/3
7. If secθ = 5/4, then find the value of cos ^2 θ-sin^2 θ
?
(a)
1
(b)
7/25
(c) 16/25
(d) 9/25
8.
The value of sin2 21° + sin223°
+ sin2 33° + sin2 57° +
sin2 67° + sin2 69° is :
(a) 1
(b) 3
(c) 5
(d) 6
9.
Find the inradius of an equilateral triangle whose
area is 9 /4 sq. cms?
(a) 3 cm
(b) 1 cm
(c) 9 cm
(d) None of these
10.
One side of a right angled triangle is 5 units and
hypotenuse is 13 unit; its area is :
(a) 35 sq.
units
(b) 25 sq. units
(c) 30 sq.
units
(d) 20 sq. units
Answers Key:
1. A
2. C
3. B
4. C
5. C
6. B
6. B
7. B
8. B
9. D
10. C
No comments:
Post a Comment