Recent content by tusher

I miscalculated. :( The steps are.. \frac{z-1}{z+1} = \frac{(x+iy-1)}{(x+iy+1)} = \frac{(x+iy-1)(x-iy-1)}{(x+iy+1)(x-iy-1)} =\frac{(x-1)^{2}-(iy)^{2}}{(x^{2})-(iy)^{2}} =...

Homework Statement Show that arg[(z-1)/(z+1)] represents a circle. Find it's radius and centre. Homework Equations The Attempt at a Solution using z = (x+iy) i narrowed down to (z-1)/(z+1) = (iy)/(1+x) , assuming it was a circle. What next? Is this correct approach??