HP 50g Graphing Calculator - Manual (Page 175)

Page 4-8
The resulting menu include some of the functions already introduced in the
previous section, namely, ARG, ABS, CONJ, IM, NEG, RE, and SIGN. It also
includes function i which serves the same purpose as the keystroke combination
„¥
, i.e., to enter the unit imaginary number i in an expression.
The keyboard-base CMPLX menu is an alternative to the MTH-based CMPLX
menu containing the basic complex number functions. Try the examples shown
earlier using the keyboard-based CMPLX menu for practice.
Functions applied to complex numbers
Many of the keyboard-based functions defined in Chapter 3 for real numbers,
e.g., SQ, ,LN, e
x
, LOG, 10
X
, SIN, COS, TAN, ASIN, ACOS, ATAN, can be
applied to complex numbers. The result is another complex number, as
illustrated in the following examples. To apply this functions use the same
procedure as presented for real numbers (see Chapter 3).