Texas Instruments TI Programmable 57 User Manual

SECTION
2:
ADVANCED/
“SLIDE
RULE”
KEYS
Ege
[Inz]
AND
—
Locaritum
Keys
Logarithms
are
mathematical
functions
that
enter
into
a
variety
of
technical
and
theoretical
calculations.
In
addition,
they
form
an
important
part
of
many
mathematical
“models”
of
natural
phenomena.
The
logarithm
keys
give
you
immediate
access
to
the
“log”
of
any
number
—
without
having
to
hassle
with
bulky
tables.
fiz)
—
The
Natural
Logarithm
Key
—
immediately
displays
the
natural
logarithms
(base
e
=
2.7182818)
of
the
number
in
the
display.
(Note:
the
number
in
the
display
must
be
positive
—
attempting
to
take
ofa
negative
number
will
result
in
a
flashing
display.)
@8—
The
Common
Logarithm
Key
—
immediately
displays
the
common
logarithm
(base
10)
of
the
(positive)
number
in
the
display.
[INV]
[inz]
anv
[INV] [2nd]
(I
—
Anmi-LocaniruM
Key
SEQueNces
These
key
sequences
are
the
“inverse”
or
“anti”
functions
of
the
logarithms.
(e""
=x,
and
100°”
=x)
These
calculations
arise
in
many
technical
situations
and
can
be
handled
quickly
with
just
a
few
keystrokes
on
your
calculator.
[INV
[In]
e*
Key
Sequence
—
Raises
e
to
the
power
of
the
number
in
the
display
(calculates
the
natural
antilogarithm
of
the
number
in
the
display).
(inv)
[2nd]
W—
10*
Key
Sequence
—
Raises
10
to
the
power
of
the
number
in
the
display
(calculates
the
common
antilogarithm
of
the
display
value).
Notes
on
logarithm
and
“anti”
logarithm
keys:
Each
of
these
keys
acts
immediately
on
the
number
in
the
display
—
and
doesn't
affect
calculations
in
progress.
Your
calculator
uses
a
variety
of
“routines”
for
arriving
at
these
values,
Certain
limits
are
set
by
these
routines
—
and
exeeding
them
may
result
in
an
error
indication
-
see
the
Appendix
C
on
error
conditions
for
details.
Some
examples:
Calculate
log
15.32,
In
203.451,
e798,
107
Press
DispLay/COMMENTS
15.32
(2nd)
1.1852588
203,451
finz}
§.3154252
69315
(5)
[INV]
[in]
0.4999986
(2nd)
ME
(2d)
(inv)
1385.4557
2-14

Texas Instruments TI Programmable 57 Specifications

General

Brand	Texas Instruments
Model	TI Programmable 57
Category	Calculator
Language	English