The angle between the lines a b (x^2-y^2 )+ (a^2-b^2 ) x y=0 is

Step-by-step solution

We have, aligned & a b (x^2-y^2 )+ (a^2-b^2 ) x y=0 & a b x^2+ (a^2-b^2 ) x y-a b y^2=0 aligned Sum of the coefficient of x^2 and y^2 i.e. a b-a b=0 Lines are perpendicular to each other. Angle between lines = / 2