3 February AffairsCloud - Class 9 MCQ

1/2

1

3/2

2

4th

4th and 5th

5th

6th

[(l/n),(m/n)]

[-(l/n),(m/n)]

[(l/n),-(m/n)]

[-(l/n),-(m/n)]

3

6

9

12

i

2 i

1

2

x dy/dx + y = 0

x + dy/dx = 0

dy/dx = y

x dy/dx -y = 0

y=2x-4

y=2x²-4

y=2

y=2x

y�+2x-x�=C

y�+2xy+x�=C

y�-2xy-x�=C

y�-2xy+x�=C

$-\sin x�$

$-\frac{\pi }{180}\sin x�$

$\frac{\pi }{180}\sin x�$

$\frac{2\pi }{180}\sin x�$

-1

2

1

1/2

log x

-log x

2 log x

x

$\frac{h\sin \left(\phi +\theta \right)}{\sin \left(\phi -\theta \right)}$

$\frac{h\sin \left(\phi -\theta \right)}{\sin \left(\phi +\theta \right)}$

$\frac{h\sin \left(\theta +\phi \right)}{\sin \left(\theta -\phi \right)}$

$\frac{h\sin \left(\theta -\phi \right)}{\sin \left(\theta +\phi \right)}$

2

2/√3

4

4/3

y = 2x� - 4

y = 2x - 4

y = 2x

y = 2

φ (y/x) = k x

x φ (y/x) = k

φ (y/x) = k y

y φ (y/x) = k

(1/2)cos⁻�(3/5)

(1/2)sin⁻�(3/5)

(1/2)tan⁻�(3/5)

tan⁻�(1/2)

0

�1, 0

1

�1

23

41

49

98

A, B are idempotent

only A is idempotent

only B is idempotent

none of these

orthogonal matrix

diagonal matrix

symmetric matrix

none of these

8

16

20

24

(n+1) π/2

(2 n + 1) π/2

nπ

None of these, when n is an integer

45�

60�

90�

180�

(2,2)

(-3,2)

(3,-2)

(2,-3)

$2x+y+4=0$

$2x+y-4=0$

$2x-y+4=0$

$2x-y-4=0$

7, 6

6, 3

5, 1

8, 7

360

900

1260

1620

5/12

3/8

5/8

1/4

1/25

2/25

3/25

4/25

1:1:1

$1:\sqrt{2}:3$

1:2:3

$2:\sqrt{3}:\sqrt{3}$