HP 25 Owner's Handbook Manual page 8

Programmable scientific calculator
Table of Contents

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BEnter
ex
ponent.
After pressing
,
next
numbers keyed in are
ex
ponents of 10
(page 31)
.
~
Radians
.
Sets
radians mode for
trigonometric
functions (page 59).
[STK]
Clear stack
.
Replaces contents of
X-
,
Y-
,
Z-
,
and T-
registers with zeros
(page 37)
.
.Clear x
.
Clears
the displayed X-
register to zero
(page
15).
~
Grads. Sets
grads mode for
trigonometric
functions (page 59).
ElElC8JEI
Arithmetic operators
(page
16).
[EJ
Natural
logarithm
.
Computes
natural logarithm
(base e, 2.718 .
..
)
of value in displayed
X-register (page 63).
~
Natural
antilog
.
Raises e (2 .718
.
.. )
to the power of value
in displayed X-register
(page 63).
~
Common
logarithm. Computes
common logarithm
(base 10) of value in
displayed X-register
(page 63)
.
~
Common
antilogarithm
.
Raises
10-
to the power of
number in displayed
X-register (page 63)
.
~
Rectangular
coordinate
conversion
.
Converts
polar magnitude and
angle in X- and Y-
registers to
rectangular x and y
coord inates (page
62).
~
Polar coordinate
conversion
.
Converts
x, y rectangular
coordinates placed
in X- and V-registers
to polar magnitude
and angle (page 62).
~
~[§]
Sine,
cosine
,
and tangent.
Calculate the sine
,
cosine, or tangent of
value in displayed
X-register (page 59).
I
sino
'
I
§J
[t304]
Arc sine
,
arc cosine
,
arc tangent.
Calculate inverse
trigonometric
function of value in
display (page 59)
.
~
Integer.
Leaves
only integer portion of
number in displayed
X-register by
truncating fractional
portion (page 51 ).
I
FRAC
I
Fraction.
Leaves only fractional
portion of number in
displayed X-register
by truncating integer
portion (page 51).
[KJ
Computes square
root of number in
displayed X-register
(page 52).
0
Computes square
of number in displayed
X-register (page 53)
.
~
Raises
number in
V-register to the
power of the number
in the displayed
X-register (page 64)
.
IABS
I
Absolute
.
Gives the absolute
val ue of the displayed
number (page 51)
.
I
.H.MS
I
Converts
displayed decimal
hours or degrees to
hours,
minutes,
seconds
format
(page 60)
.
E!D
Converts
displayed value in
hours,
minutes,
seconds
format to
decimal hours or
degrees (page 60).
I
LAST
X
I
Recalls
number displayed
before the previous
operation back into
the displayed
X-register (page 49).
~
Pi. Places value
of pi (3.14159
...
)
into displayed X-
register (page 53).

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