Question 984944
An Argand diagram is a plot of complex numbers as points
{{{z = x+iy}}}
in the complex plane using the x-axis as the real axis and y-axis as the imaginary axis.


{{{ drawing( 600, 600, -10, 10, -10, 10,
circle(0,0,6),circle(3,5.2,.12),locate(3,5.6,p(x+iy)),
line(0,0,3,5.2),line(3,0,3,5.2),locate(0.5,.7,theta),
graph( 600, 600, -10, 10, -10, 10, 0)) }}}


In the plot above, the circle represents the complex modulus |z| of z and the angle theta represents its complex argument.