The pair of lines `ax^(2)+2hxy+by^(2)=0` represents a pair of perpendicular lines then

The equation ax^(2)+2hxy+by^(2)=0 represents a pair of perpendicular lines if

If ax^(2)+6xy+3y^(2)-10x+10y-6=0 represents a pair of perpendicular lines, then |a|=

The equation x^(2)+k_(1)y^(2)+k_(2)xy=0 represents a pair of perpendicular lines if

The equation ax^(2)+3xy-3y^(2)=0 reprougents a pair of perpendicular lines through origin then a equals

If the equation x^(2)+py^(2)+y=a^(2) represents a pair of perpendicular lines,then the point of intersection of the lines is

If the equation ax^(2)+2hxy+by^(2)+2gx+2fy+c=0 represents a pair of parallel lines, then

The equation a^(2)x^(2)+2h(a+b)xy+b^(2)y^(2)=0 and ax^(2)+2hxy+by^(2)=0 represent two pairs of perpendicular straight lines two pairs of parallel straight lines two pairs of straight lines which are equally inclined to each other none of these

Let the equation ax^(2)+2hxy+by^(2)=0 represents a pair of straight lines then the angle theta - between the lines is given by cos theta=