If `arg(z-1)=arg(z+2i)`, then find `(x-1):y`, where `z=x+iy`

If arg(z-1)=arg(z+3i), then find (x-1):y, where z=x+iy

If arg(z-1)=arg(z+3i), then find (x-1)/y, where z=x+iy

If arg(z-1)=arg(z+3i) , then find (x-1):y , where z=x+iy .

If arg(z-1)=arg(z+3i) , then find x-1,y, where z=x+iy

If arg(z) lt 0, then find arg(-z) -arg(z) .

If arg(z) lt 0, then find arg(-z) -arg(z) .

If arg (bar (z) _ (1)) = arg (z_ (2)) then

If arg(z_(1))=(2pi)/3 and arg(z_(2))=pi/2 , then find the principal value of arg(z_(1)z_(2)) and also find the quardrant of z_(1)z_(2) .