tan x + tan(x + π/3)+tan(x+2π/3)=3⇒tan3x=

1.  3

2.  2

3.  1

4.  0

4

1

Explanation :
No Explanation available for this question

3sinx+4cosx=5⇒6tan(x/2)-9tan2(x/2)=

1.  0

2.  1

3.  3

4.  4

4

1

Explanation :
No Explanation available for this question

If 1/2 ≤x≤1 then

1.  π/6

2.  π/3

3.  π

4.  0

4

π/3

Explanation :
No Explanation available for this question

If a, b, c form a geometric progression with common ratio r,then the sum of the ordinates of the Points of intersection of the line ax + by + c = 0 and the curve x + 2y2=0

1.  –r2/2

2.  –r/2

3.  r/2

4.  r

4

r/2

Explanation :
No Explanation available for this question

The point (3, 2) undergoes the following three transformations in the order given i) Reflection about the line y = x

1.  (-√18,√18)

2.  (-2, 3)

3.  (0,√18)

4.  (0,3)

4

(0,√18)

Explanation :
No Explanation available for this question

If X is a poission variate such that α=P(X=1)=P(X=2) then P(X= 4)

1.  2α

2.  α/3

3.  αe-2

4.  αe2

4

α/3

Explanation :
No Explanation available for this question

Suppose X follows a binomial distribution with parameters n and p, Where 0

1.  1/2

2.  1/3

3.  1/4

4.  1/8

4

1/2

Explanation :
No Explanation available for this question

In an entrance test there are multiple choice questions. There are four possible answers to each question, of which one is correct. The probability that a student know the answer to a question is 9/10.If he gets the correct answe

1.  37/40

2.  1/37

3.  36/37

4.  1/9

4

1/37

Explanation :
No Explanation available for this question

There are four machines and it is known that exactly two of them are faulty .They are tested one by one, in a random order till both the faulty machines are identified. Then the probability that only two tests are need is

1.  1/3

2.  1/6

3.  1/2

4.  1/4

4

1/3

Explanation :
No Explanation available for this question

1.  1/2

2.  1/4

3.  1/8

4.  3/8

4