# If (1,2),(4,3) are the limiting points of a system of coaxial circles, then the radical axis of the system is

1.  3x+2y-10=0

2.  3x+y-10=0

3.  2x+y-10=0

4.  x+y+6=0

4

3x+y-10=0

Explanation :
No Explanation available for this question

# The length of the tangent from (6,8) to the circle  x2+y2 =4 is

1.  √6

2.  2√6

3.  4√6

4.  5√6

4

4&#8730;6

Explanation :
No Explanation available for this question

# The equation of the normal to the circle x2+y2-2x-2y-2=0 at the point(3,1) on it is

1.  x = 1

2.  y = 2

3.  y = -1

4.  y =1

4

y =1

Explanation :
No Explanation available for this question

# The equation of the line directrix to the parabola y2-2x-6y-5=0 is

1.  2x+5 = 0

2.  x+5 = 0

3.  2x+13 = 0

4.  x+2 = 0

4

2x+13 = 0

Explanation :
No Explanation available for this question

# The pole of the line 2x+3y-4=0 with respect to the parabola y2=4x,is

1.  (2,3)

2.  (2,-3)

3.  (1,1)

4.  (-2,-3)

4

(-2,-3)

Explanation :
No Explanation available for this question

# The eccentricity of ellipse 9x2+4y2=36 is

1.  √5/9

2.  5/9

3.  5/3

4.  √5/3

4

√5/3

Explanation :
No Explanation available for this question

# One of the foci of hyperbola id origin and the corresponding directrix is 3x+4y+1=0.The eccentricity of the hyperbola is √5.The equation to the hyperbola is

1.  8x2+9y2-24xy+6x+8y+1=0

2.  8x2+9y2+24xy+6x+8y+1=0

3.  8x2+9y2+24xy+6x+6y+1=0

4.  8x2+15y2+24xy+6x+8y+1=0

4

8x2+15y2+24xy+6x+8y+1=0

Explanation :
No Explanation available for this question

# If f(x) =sinx/x,x≠0,if f(x) is to be continuous at x = 0,then f(0) is equal to

1.  0

2.  1

3.  -1

4.  2

4

1

Explanation :
No Explanation available for this question

# (d/dx)( cos x0) is equal to

1.  -sinx0

2.  (-π/180) sinx0

3.  (π/180) sinx0

4.  none of these

4

(-&#960;/180) sinx<sup>0</sup>

Explanation :
No Explanation available for this question

# Derivative of sin2x with respect to (logx)2 is

1.  (x sin x cos x)/(log x)

2.  (2 sin x cos x)/(log x)2

3.  sin2x/2 log x

4.  x log x

4