If `x^2-2p x y-y^2=0` and `x^2-2q x y-y^2=0` bisect angles between each other, then find the condition.

If x^(2)-2pxy-y^(2)=0 and x^(2)-2qxy-y^(2)=0 bisect angles between each other,then find the condition.

If the pair of straight lines x^(2)-2pxy-y^(2)=0 and x^(2)-2qxy-y^(2)=0 be such that each pair bisects the angle between the other pair,then

If the pair of straight lines ax^(2)-2pxy-y^(2)=0and x^(2)-2qxy-y^(2)=0 are such that each pair bisects the angle between the other pair , then prove that pq=-1 .

If pairs of lines 3x^(2)-2pxy-3y^(2)=0 and 5x^(2)-2qxy-5y^(2)=0 are such that each pair bisects then angle between the other pair then pq=

If x^(2)+y^(2)-2x-6y+10-r^(2)=0 and x^(2)+y^(2)+6x=0 intersect orthogonal to each other,then the value of r

If the lines x^(2)+2hxy-y^(2)=0 bisect the angle between the lines 2x^(2)+10xy-y^(2)=0 then h=

If the circles x^(2)+y^(2)+2ax+c=0 and x^(2)+y^(2)+2by+c=0 touch each other,then find the relation between a,b and c.

If the circles x^2+y^2+2x-8y+8=0 and x^2+y^2+10x-2y+22=0 touch each other find their point of contact

The circles x^2+y^2+x+y=0 and x^2+y^2+x-y=0 intersect at an angle of