Find the eq.n of the sides of a triangle having (4,-1) as a vertex, if the lines x-1=0and x-y-1=0are the equations of two int.bisectors of its angles? If roots of an equation x^n - 1 are 1,a1,a2,a3…a n-1 then the value of (1-a1) (1-a2) (1-a3) (1-an-1) is?