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HP HP-67

HP HP-67
364 pages
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Function
Keys
89
Square
Roots
To
calculate
the
square
root
of
a
number
in
the
displayed
X-register,
press
[l
().
For
example,
to
find
the
square
root
of
16:
Press
Display
16
11
(3
To
find
the
square
root
of
the
result:
Press
Display
0E
Squaring
To
square
a
number
in
the
displayed
X-register,
press
£
(xJ.
For
example,
to
find
the
square
of
45:
Press
Display
48
To
find
the
square
of
the
result:
Press
Display
a
4100625.00
Using
Pi
The
value
7
accurate
to
10
places
(3.141592654)
is
provided
as
a
.fix.ed
constant
in
the
HP-67.
Merely
press
@3
whenever
you
need
1t
in
a
calculation.
For example,
to
calculate
37
Press
Display
@O

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