# If 5x-12y+10=0 and 12y-5x+16=0 are two tangents to a circle,then the radius of the circle is

1.  1

2.  2

3.  4

4.  6

4

1

Explanation :
No Explanation available for this question

# The eccentricity of the ellipse 9x2+5y2-18x-20y-16=0,is

1.  1/2

2.  2/3

3.  3/2

4.  2

4

2/3

Explanation :
No Explanation available for this question

# If u=xy2 tan-1(y/x), then is equal to:

1.  2u

2.  u

3.  3u

4.  (1/3)u

4

3u

Explanation :
No Explanation available for this question

# The product of the lengths of perpendiculars drawn from any point on the hyperbola x2-2y2-2=0 to its asymptotes is

1.  1/2

2.  2/3

3.  3/2

4.  2

4

2/3

Explanation :
No Explanation available for this question

# The equation of the parabola with with focus(0,0)and directrix x+y = 4 is

1.  x2+y2-2xy+8x+8y-16=0

2.  x2+y2-2xy+8x+8y=0

3.  x2+y2+8x+8y-16=0

4.  x2-y2+8x+8y-16=0

4

x<sup>2</sup>-y<sup>2</sup>+8x+8y-16=0

Explanation :
No Explanation available for this question

# is equal to:

1.  2/3(tan-1√x)+c

2.  2/3(tan-1√x/3)+c

3.  tan-1√x+c

4.  (tan-1√x/3)+c

4

2/3(tan-1√x/3)+c

Explanation :
No Explanation available for this question

# is equal to

1.  xex+c

2.  x2xx+c

3.  (x+1)ex + c

4.  (x2+1)ex + c

4

(x2+1)ex + c

Explanation :
No Explanation available for this question

# is equal to

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# is equal to

1.  π/512

2.  3π/512

3.  5π/512

4.  7π/512

4

7π/512

Explanation :
No Explanation available for this question

# for

1.  any value of a and b

2.  a > 0, b > 0 only

3.  a > 0, b < 0 only

4.  a < 0, b < 0 only

4