#### 11th Standard Maths English Medium Free Online Test 1 Mark Questions 2020

11th Standard

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Maths

Time : 00:10:00 Hrs
Total Marks : 10

10 x 1 = 10
1. The function f:R➝R be defined by f(x)=sinx+cosx is

(a)

an odd function

(b)

neither an odd function nor an even function

(c)

an even function

(d)

both odd function and even function

2. If ${ log }_{ \sqrt { x } }$ 0.25 =4 ,then the value of x is

(a)

0.5

(b)

2.5

(c)

1.5

(d)

1.25

3. $\sqrt [ 4 ]{ 11 }$ is equal to

(a)

$\sqrt [ 8 ]{ 11^{ 2 } }$

(b)

$\sqrt [ 8 ]{ 11^{ 4 } }$

(c)

$\sqrt [ 8 ]{ 11^{ 8 } }$

(d)

$\sqrt [ 8 ]{ 11^{ 6 } }$

4. If tan α and tan β are the roots of tan2x + atanx + b = 0; then $\frac { sin(\alpha +\beta ) }{ sin\alpha sin\beta }$ is equal to

(a)

$\frac { b }{ a }$

(b)

$\frac { a }{ b }$

(c)

$\frac { a }{ b }$

(d)

$\frac { b}{ a }$

5. If tanA=$\frac { a }{ a+1 }$ and B=$\frac { 1 }{ 2a+1 }$ then the value of A+B is

(a)

0

(b)

$\frac { \pi }{ 2 }$

(c)

$\frac { \pi }{ 3 }$

(d)

$\frac { \pi }{ 4 }$

6. $\frac{1}{360}$ of a complete rotation clockwise is

(a)

-1°

(b)

-360°

(c)

-90°

(d)

7. The product of r consecutive positive integers is divisible by

(a)

r!

(b)

r!+1

(c)

(r+1)

(d)

none of these

8. If $\frac { 1 }{ 7! } +\frac { 1 }{ 8! } =\frac { A }{ 9! } ,$ then the value of A is

(a)

72

(b)

82

(c)

9

(d)

92

9. Find the odd one out of the following

(a)

$\hat { i } +2\hat { j } +3\hat { k }$

(b)

$2\hat { i } +4\hat { j } +6\hat { k }$

(c)

$7\hat { i } +14\hat { j } +21\hat { k }$

(d)

$\hat { i } +3\hat { j } +2\hat { k }$

10. If two events A and B are such that $P(\overline{A})={3\over10}$ and $P(A \cap \overline{B})={1\over2},$ then $P(A\cap B)$ is

(a)

${1\over2}$

(b)

${1\over3}$

(c)

${1\over4}$

(d)

${1\over5}$