The condition that the chord `xcosalpha+ysinalpha-p=0` of `x^2+y^2-a^2=0` may subtend a right angle at the center of the circle is

The condition that the chord xcos alpha +ysin alpha -p=0 of x^2+y^2-a^2=0 may subtend a right angle at the centre of the circle is

The condition that the chord x cos alpha+y sin alpha-p=0 of x^(2)+y^(2)-a^(2)=0 may subtend a right angle at the center of the circle is

The condition that the chord a x cos alpha +y sin alpha -p=0" of "x^(2)+y^(2)-a^(2)=0 subtend a right angle at the centre of the circle is

The condition that the chord x cos alpha+y sin alpha=p of x^(2)+y^(2)=a^(2) may subtend a right angle at the centre is a^(2)=lambda p^(2) then lambda is

The locus of the point, the chord of contact of which wrt the circle x^(2)+y^(2)=a^(2) subtends a right angle at the centre of the circle is

The locus of the point, the chord of contact of which wrt the circle x^(2)+y^(2)=a^(2) subtends a right angle at the centre of the circle is

If the chord xcosalpha+ysinalpha=p of the hyperbola (x^2)/(16)-(y^2)/(18)=1 subtends a right angle at the center, and the diameter of the circle, concentric with the hyperbola, to which the given chord is a tangent is d , then the value of d/4 is__________

If the chord xcosalpha+ysinalpha=p of the hyperbola (x^2)/(16)-(y^2)/(18)=1 subtends a right angle at the center, and the diameter of the circle, concentric with the hyperbola, to which the given chord is a tangent is d , then the value of d/4 is__________

If the chord xcosalpha+ysinalpha=p of the hyperbola (x^2)/(16)-(y^2)/(18)=1 subtends a right angle at the center, and the diameter of the circle, concentric with the hyperbola, to which the given chord is a tangent is d , then the value of d/4 is__________