Section 11: Calculating With Complex Numbers 131
One-Number Functions
The following functions operate on both the real and imaginary parts of the
number in the X-register, and place the real and imaginary parts of the
answer back into those registers.
¤ x
N
o
∕
@
'
a
:
;
All trigonometric and hyperbolic functions and their inverses also belong to
this group.*
The
a
function gives the magnitude of the number in the X-registers
(the square root of the sum of the squares of the real and imaginary parts);
the imaginary part of the magnitude is zero.
:
converts to polar form and
;
converts to rectangular form,
as described later in this section (page 133).
For the trigonometric functions, the calculator considers numbers in the real
and imaginary X-registers to be expressed in
radians
—regardless of the
current trigonometric mode. To calculate trigonometric functions for values
given in degrees, use
r
to convert those values to radians before
executing the trigonometric function.
Two-Number Functions
The following functions operate on both the real and imaginary parts of the
numbers in the X- and Y-registers, and place the real and imaginary parts of
the answer into the X-registers. Both stacks drop, just as the ordinary stack
drops after a two-number function
not
in Complex mode.
+
-
*
÷
y
Stack Manipulation Functions
When the calculator is in Complex mode, the following functions
simultaneously manipulate both the real and imaginary stacks in the same
way as they manipulate the ordinary stack when the calculator is not in
Complex mode. The
®
function. for instance, will exchange
both
the
real and imaginary parts of the numbers in the X- and Y-registers.
®
)
(
v
K
* Refer to the
HP-15C Advanced Functions Handbook
for definitions of complex
trigonometric functions and further information about doing calculations in Complex mode.
Summary of Contents for HP-15C
Page 1: ...HP 15C Owner s Handbook HP Part Number 00015 90001 Edition 2 4 Sep 2011 ...
Page 17: ...Part l HP 15C Fundamentals ...
Page 64: ......
Page 65: ...Part ll HP 15C Programming ...
Page 118: ...118 ...
