z-w=cosa-1+(1+sina)i
I z-wI=√[(cosa-1)^2+(1+sina)^2]=√(3-2cosa+2sina)=√[3-2(sina-cosa)]
sina-cosa=√2*(sinacos45°-cosasin45°)=√2*sin(a-45°)
a属于[0,TT],-45°