when you have a argz equation, the general form for graphing the points is arg(z-(x+iy)), where x+iy is the point where you have the start of the ray. When there is 2 args in an equation arg(z)=arg(w), you see where they overlap. e.g. for (a) the equation is arg(z-(0+i))=arg(z-(1+0i)), so you...