With one focus of the hyperbola `x^2/9-y^2/16=1` as the centre, a circle is drawn which is tangent to the hyperbola with no part of the circle being outside the hyperbola. The radius of the circle is

An ellipse is drawn with major and minor axis of length 10 and 8 respectively.Using one focus a centre,a circle is drawn that is tangent to ellipse,with no part of the circle being outside the ellipse.The radius of the circle is (A) sqrt(3)(B) (C) 2sqrt(2)(D)sqrt(5)

A circle is drawn whose centre is on the x - axis and it touches the y - axis. If no part of the circle lies outside the parabola y^(2)=8x , then the maximum possible radius of the circle is

The foci of the hyperbola (x^(2))/(16) -(y^(2))/(9) = 1 is :

The line 2x-y+1=0 is tangent to the circle at the point (2,5) and the centre of the circles lies on x-2y=4. The radius of the circle is

The line 2x-y+1=0 is tangent to the circle at the point (2,5) and the centre of the circles lies on x-2y=4. The radius of the circle is :

The line 2x-y+1=0 is tangent to the circle at the point (2,5) and the centre of the circles lies on x-2y=4 The radius of the circle is:

The locus of the midpoint of the chord of the circle x^2+y^2=25 which is tangent of the hyperbola x^2/9-y^2/16=1 is