HP -65 Owner's Handbook Manual page 31

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We will store these constants in R; and R,.
Solution:
Press
B[] @
3.7854 [sTO
See Displayed
EzZE
2.54 [s10] 2]
2.5400
3.6
[RCL
x
EEEA
13.5 et 2] x
ECEEIE
5.5
[RCL
LS
20.3197
209 Ret [2) x
EENEEA
11.3 [RCL
SO
42.7750
32.8 el (2] x|
|EEEIE
83.31
E=a [ (2]
Choosing Addressable Registers
Comment
Stores liters/gallons
conversion constantin R;.
Stores centimeters/inch
conversion constant in R,.
Capacity of tank 1in
liters.
Height of tank 1 in
centimeters.
Capacity of tank 2 in
liters.
Heightof tank 2 in
centimeters.
Capacity of tank 3
in liters.
Heightof tank 3 in
centimeters.
Resets display.
Exceptfor the case of registers Ry and R,, it is immaterial as to
which registers you use.
R, is the special object of the Decrement and Skip on Zero ([&]
[DSZ]) operation (presented in Section 4), which uses it as a de-
scending counter (index) in program applications. If this use is
contemplated, Rshould be avoided for other uses. Otherwise,
it may be freely used.
R, is subject to alteration by the trigonometric functions (includ-
ing the rectangular/polar conversions) and the relational tests
(used in programs). These functions use R, for intermediate cal-
culations (scratch). At other times R, is available for your use.

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