# In ΔABC, if r1 =3, r2= 10, r3= 15, then c=

1.  5

2.  12

3.  13

4.  13/2

4

13

Explanation :
No Explanation available for this question

1.  1

2.  e

3.  e-1

4.  0

4

1

Explanation :
No Explanation available for this question

# The domain ofis

1.  [0, 5]

2.  [1, 4]

3.  [-1, 2]

4.  none

4

[1, 4]

Explanation :
No Explanation available for this question

# The domain of log10 (x3-x) is

1.  (-1, 0) U (1, ∞)

2.  (-∞, -1) U (1, ∞)

3.  (-∞, 0) U (1, ∞)

4.  (-∞, -1) U (0, ∞)

4

(-1, 0) U (1, ∞)

Explanation :
No Explanation available for this question

# If the area of a triangle is 6 sq. unit and its inradius 2 unit then its perimeter is

1.  1

2.  2

3.  3

4.  6

4

6

Explanation :
No Explanation available for this question

# The domain of tan 3x is the domain of

1.  cot 3x

2.  cos 3x

3.  sec 3x

4.  sin 3x

4

sec 3x

Explanation :
No Explanation available for this question

1.  1

2.  e

3.   e-1

4.  0

4

1

Explanation :
No Explanation available for this question

# The domain of logx e is

1.  (0, 1) U (1, ∞)

2.  (0, 2) U (2, ∞)

3.  (0, 1) U (2, ∞)

4.  R

4

(0, 1) U (1, ∞)

Explanation :
No Explanation available for this question

# If 2,4,6,12 are in radius and the exradii of triangle, then its area is

1.  6 sq.unit

2.  24 sq.unit

3.  30 sq.unit

4.  12 sq.unit

4

24 sq.unit

Explanation :
No Explanation available for this question

1.  0

2.  1

3.  log 2

4.  log 4

4