The equation of the family of curves which intersect the hyperbola xy-2 orthogonally is

The equation of curves which intersect the hyperbola xy=4 at an angle pi/2 is

The equation of curves which intersect the hyperbola xy=4 at an angle (pi)/(2) is

Find the equation of family of curves which intersect the family of curves xy=c at an angle 45^(@) .

Out of the four curves given below choose the curve which intersects the parabola y^(2)=4ax orthogonally.

Which of the following is not the differential equation of family of curves whose tangent form an angle of pi/4 with the hyperbola xy= c^2 ?

Which of the following is not the differential equation of family of curves whose tangent form an angle of pi/4 with the hyperbola xy= c^2 ?

The differential equation of family of curves whose tangent form an angle of pi/4 with the hyperbola xy=C^2 is

Which of the following is not the differential equation of family of curves whose tangent from an angle of pi/4 with the hyperbola xy=c^(2) ?