=1 ⇒a2=6,b2=2 Now, equation of any variable tangent is y=mx±√a2m2+b2 . . . . (i) where m is slope of the tangent So, equation of perpendicular line drawn from centre to tangent is y=
−x
m
. . . . (ii) Eliminating m, we get (x4+y4+2x2y2)=a2x2+b2y2 ⇒(x2+y2)2=a2x2+b2y2 ⇒(x2+y2)2=6x2+2y2