HP 49g+, Руководство пользователя, Страница: 164 / 862

Page 4-6
RE(z) : Real part of a complex number
IM(z) : Imaginary part of a complex number
C
→
R(z) : Takes a complex number (x,y) and separates it into its real and
imaginary parts
R
→
C(x,y): Forms the complex number
(x,y)
out of real numbers x and y
ABS(z) : Calculates the magnitude of a complex number or the absolute value
of a real number.
ARG(z): Calculates the argument of a complex number.
The remaining options (options 7 through 10) are the following:
SIGN(z) : Calculates a complex number of unit magnitude as z/|z|.
NEG
: Changes the sign of z
CONJ(z): Produces the complex conjugate of z
Examples of applications of these functions are shown next. Recall that, for
ALG mode, the function must precede the argument, while in RPN mode, you
enter the argument first, and then select the function. Also, recall that you can
get these functions as soft menus by changing the setting of system flag 117
(See Chapter 3).
This first screen shows functions RE, IM, and C
R. Notice that the last
function returns a list {3. 5.} representing the real and imaginary components
of the complex number:
The following screen shows functions R
C, ABS, and ARG. Notice that the
ABS function gets translated to |3.+5.i|, the notation of the absolute value.