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THE KEYBOARD
VECTOR KEYS
NOTE
ln the following example notice in particular the
powerful combination of vector keys and logarithmic
keys
(ln x and eX) which allow numbers tobe added
and numbers
to
be multiplied simultaneously.
EXAMPLE:
(b):
Multiplication of complex numbers
(j=
i
=
H)
(3+j4)
(-
2
+
j3)
==-18+
jl
this
problern is best solved in the calculator by the
following method as this can be easily adapted to
solve problems with many complex
terms:
1.
convert the quantities in parentheses to
polar form
(R
L9),
2.
multiply the R quantities and add the
angles,
3.
convert the result
bacl~
to reetangular form.
SWITCH:
DEGREES
SWITCH:
FIXED POINT
SET: DECIMAL DIGITS to 3
clear the (
+
)e and (
+)
F
registers:
PRESS:
CLEAR
enter (3+j4) and convert
to
polar form (R
1
L9
1
):
PRESS:
4
t
3
TO
POLAR
take the
log
of R
1
and
store
lnR
1
in
(+
)F
and
@I
in
C+)e:
PRESS:
ln x
ACC
+
enter
(-
2+j3) and convert to polar
form
(R
2
L9
2
):
PRESS:
3
t
CONTINUED
2
CHG
SIGN
TO
POLAR
55
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