If the acute angle between the lines x²-4 x y+y²=0 is ⁻¹(k) , then k =

Step-by-step solution

Acute angle between the lines is given by = | 2 h²-a b a+b | array l Here a=1,2 h=-4 h=-2, b=1 = | 2 4-1 1+1 | = 3 = ⁻¹( 3 ) k= 3 array