#MrG 2015.1105 cis(theta)
#1) convert 1+sqrt(3)*i to r*cis(theta)
r=sqrt(1^2+sqrt(3)^2)
show(r)
theta=arctan(sqrt(3)/1)*180/pi
show(theta.n())
show(abs(1+sqrt(3)*i).n())
show((arg(1+sqrt(3)*i)*180/pi).n())
#2) convert 2*cis(60) to x+y*i
x=2*cos(60*pi/180)
show(x.n())
y=2*sin(60*pi/180)
show(y)