HP HP-28S - Using Polar Coordinates

• 1M (imaginary part) returns y for a complex argument (x, y).
• CON] (conjugate) returns (x, -y) for a complex argument (x, y).
• SIGN returns (x/yx
2
+ y2, y/yx
2
+ y2) for a complex argument
(x, y).
Display the next row of the COMPLEX menu.
INEXTI ~2~:----------------~(~0~,~2~)
1: (1.57079632679~
-1.31695789692)
DmIDDlI:llBlCIB.:IB_
These functions (except NEG) relate to complex numbers in polar
coordinates.
Using Polar Coordinates
A point in a plane can be described by two different coordinate sys-
tems.
The illustration below shows one point described two ways, in
rectangular notation (x, y) and in polar notation (r, 0).
x
\
1/
H
84 6: Complex-Number Functions