3.
L_
of
Cosines
"
Solve for C knowing A,
B,
and
0
The
basic
equation
is
C -
VA'+B'
2ABCOSD
Mode: AER c
Note
that
since
the
entire
equation
falls
under
the
square
root
sign parenthesis
must
be
used.
~.~~
~~rn~rn~rnffi~~m~
m~rn~rn[EJG
2
~m~[]]~~
rn
Change
to
COMP
mod
e Angle Mode: DEG (Floating decimal
point
system I
Press
~
Put
in
3 for A
Press
~
PUt
in 4 for B
Press I§!!!) Put in
60
for 0
Press
~
value of
the
third side
is
3.605551275
Solve for angle of
45
° instead of
60
0
Press
~
until
the
disp
lay reads D ·
:j:
Key in:
45
Press
~
,wlue
of
the
third
side;s
2.833626167
Turn
off
the
calculator
.
If
you
wish
to
use
thiHquation,
at
a later
date,
"Memory
Sa
fe
Guard"
will
protect
the
equation
and
it
will
be
there
at
that
time for reuse. All
equat
ions in
the
AER Mode
and
all
information in memories in
the
COMP Mode
are retained unless intentionally erased.
4, Business AppliClitions
There are
many
business applications for which
the
EL-5103
is
an ideal tool. This
uample
also illustrates
that
the
answer
from
one
equation
may
be
stored
and
used in
. n
other
equation.
A series of discounts from
the
list price
are
offered.
They
are
35%, 3%,
and
2%.
Ca
lculate
the
final price
for
a series
of
prices
starting
at
$100
and
continuing
at
$1
10,
$120.
etc. 35%
is
equivalent
to
.
65;
3%
to
.97;
and
2%
to
.98.
The
initial price call
IAI
Mode: AER
Key
in:
~
@
I!IB
~
m
ffi§
.65
~
m
IEQI
m
~
GJ
.97
~rn(!!Q][{]~
C!J
.
98
~
~~C!J~
mrn
10
(!!Q]
rn
"
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