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T E KEYBOARD
FU
CTIO
KEYS
Replaces the contents of the X register with the logari-
thm, to the base 10, of the contents of X.
To take antilogarithms
to the
base 10, the following formula is
used:
x
==
10 Y (where
y
=
log
1o
x)
10
Y
can be calculated using the natural logarithm,
ln 10 Y
==
y ·
ln
10
taking the antilog
(ln-
1
x
=
ex ),
x
==
e
(y ·
ln 1 0)
EXAMPLE:
take the antilog
10
of .60206
( log-
1
.60206
=-
4)
10
I
SWITCH:
FIXED POINT
SET:
DECIMAL DIGITS to 5
take
the
natural
log
of 10:
PRESS:
1
0
DISPLAY:
ln 10
~
Y
multiply ln 10 by y:
PRESS:
•
6
PRESS:
0
6
ln
x
0
X
DISPLAY:
y ·
ln 10
~
X
take ln-
1
(y · ln 1 0)
PRESS:
ex
....
t
2
DISPLAY:
( log-1
.60206
:
)
Lf.
DDDDD
10
~
.t
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