If the two lines given by a x^2+2 hxy + by ^2=0 make inclinations and , then ( + )=

Step-by-step solution

Lines given by ax 2+2 h x y+b^2=0 make inclinations and . + = -2 ~h ~b and = a b Now ( + )= + 1- = (- 2 h b ) 1- ( a b ) = -2 h b b (b-a) ( + )= -2 h b-a = 2 h a-b