The products of lengths of perpendiculars from any point of hyperbola x2 - y2 = 8 to its asymptotes, is
2
3
4
8
C.
4
The equation 16x2 + y2 + 8xy - 74x - 78y + 212 = 0 represents
a circle
a parabola
an ellipse
a hyperbola
iF a is a complex number and b is a real number, then the equation represents a
straight line
parabola
circle
hyperbola
The four distinct points (0, 0), (2, 0), (0, - 2)and (k, - 2) are concyclic, if k is equal to
3
1
- 2
2
If e and e' are the eccentricities of the ellipse 5x2 + 9y2 = 45 and the hyperbola 5 - 4y = 45 respectively, then ee' is equal to
1
4
5
9
If 5x - 12y + 10 = 0 and 12y - 5x + 16 = 0 are two tangents to a circle, then the radius of the circle is
1
2
4
6
If P1, P2, P3 are the perimeters of the three circles
x2 + y2 + 8x - 6y = 0, 4x2 + 4y - 4x - 12y - 186 = 0 and x2 + y - 6x + 6y - 9 = 0 respectively, then