Complex numbers, To display polar coordinates for complex numbers, Complex numbers -11 – HP 48g Graphing Calculator User Manual
Page 153
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Complex Numbers
Most functions that work with real numbers also work with complex
numbers. So, the way you use complex numbers is similar to the way
you use real numbers.
The examples in this section assume the calculator is set to Degrees
mode. (Press (
modes
) HNGL DEG to set Degrees mode.)
Displaying Complex Numbers
You can display complex numbers as either rectangular coordinates or
polar coordinates—in Rectangular mode or in Polar mode.
To display rectangular coordinates
for complex numbers:
■ Press (r^fPOLAR 1 until no coordinate annunciator is on.
or
m Press ff^fMODES) ff) ff), then press {*/-) until Rect-anguLar is
displayed in the COORD SYSTEM; field. Confirm your selection by
pressing OK.
To display polar coordinates for complex numbers:
■ Press (rRiPOLARl until the RiZ or RZZ coordinate annunciator is
on.
or
■ Press (r^fMODES] (T) fT), then press (+/-) until PoLar is displayed
in the COORD SYSTEM: field. Confirm your selection by pressing
12
Even though only two coordinate modes are needed for complex
numbers, three coordinate modes are available on the HP 48 (to
provide for three-dimensional vectors)—Rectangular mode, Polar
(cylindrical) mode, and Spherical mode.
Complex numbers are displayed inside parentheses. In rectangular
form, the real and imaginary parts are separated by a comma. (If
the Fraction Mark is set to comma, they’re separated by a semicolon
Functions of Real and Complex Numbers 12-11