Advertisement
Random Number,
Pressing
;T,1ffi
displays a random number
in
the
range
0
When
".*1
is
pressed
for the first time, the
HP-27S
uses
the
system
clock
to generate a
seed
number that initiates the
sequence
of ran-
dom numbers.
Pressing
0
[sTo
I
,t.f'ffi,ffiffi
uses
a new
seed
from
the
system clock.
To
specify
a
particular
seed,
k"y in
the
seed (a
non -zero
number) and
press
tErol
+,-l..&*ffi
to display the
random number. you
can repeat a
random number
sequence
by
storing the same non-zero
seed.
Factorial'
+$
calculates
the factorial
of
the rightmost number on
the
calculator
line. The
number must be an integer
in
the range
0
through
253.
Hyperbolic Functions
The HYP menu provides the hyperbolic functions. The functions
use
the rightmost number
in
the calculator line.
Table 2-5. Hyperbolic Functions
Menu Key
Function
Menu Key
Function
Hyperbolic
sine
Hyperbolic
cosine
Hyperbolic tangent
tTtffi
u
fn#*.
lnverse
hyperbolic
sine
lnverse
hyperbolic
cosine
lnverse
hyperbolic
tangent
Keys:
It
HYPI 5
*xffi*
540.25
i
Display:
F4,
EBSE
6, 5fi53
Description:
Hyperbolic
sine.
Inverse hyperbolic
cosine.
Exits the HYP menu.
lmt
*
The number is
part
of
a
sequence
of uniformly
distributed pseudo-random numbers.
This
sequence
Passes
the spectral test
(D.
Ifuuth,
Seminumerical
Algorithms,Yol.2, London:
Addi-
son
Wesley,
1981).
2=
Keyboard Arithmetic and Numeric Functions
Advertisement
