Find the condition for the line
lx+my+n=0 to be a tangent to the ellipse `x^2/a^2+y^2/b^2=1`

Find the condition for the line lx+my+n=0 to be a normal to the ellipse x^2/a^2+y^2/b^2=1

The condition that the line x/p+y/q=1 to be a tangent to the ellipse x^(2)/a^(2)+y^(2)/b^(2)=1 is

Find the condition for the line x cos alpha +y sin alpha =p to be a tangent to the ellipse x^2/a^2+y^2/b^2=1 .

Find the condition for the line lx + my + n =0 is a tangent to the circle x^(2) + y^(2) = a^(2)

Find the condition for the straight line lx+my+n=0 to be a tangent to the parabola y^(2)=4ax and find the coordinates of the point of contact.

Find the condition that the line lx + my = n may be a normal to the ellipse x^(2)/(a^(2)) + y^(2)/b^(2) =1

The condition that the line lx + my + n= 0 to be a normal to the ellipse (x^(2))/(a^(2)) + (y^(2))/(b^(2))= 1 is

Find the condition, that the line lx + my + n = 0 may be a tangent to the circle (x - h)^(2) + (y - k)^(2) = r^(2) .

The line lx+my=n is a normal to the ellipse x^(2)/a^(2)+y^(2)/b^(2)=1

The line lx+my=n is a normal to the ellipse x^(2)/a^(2)+y^(2)/b^(2)=1