HP 25 User Manual

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-
r
egisters 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).
I ABS 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).

HP 25 Specifications

General

Power Source	Rechargeable battery pack
Programming Steps	49
Release Year	1975
Functions	Trigonometric, logarithmic, statistical
Type	Scientific
Dimensions	148 x 80 x 14 mm