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Direct Algebraic Logic (D.A.L.)
Until the introduction of SHARP's D.A.L., keying in equations had been a
complicated process making scientific calculators difficult to use.
Introduced in 1992 and an industry-first, SHARP's D.A.L. allows symbols
and numbers of an equation to be entered as they are written. Instead of
wasting energy on difficult calculator operations, users are free to
concentrate on mathematical concepts.
For example, you want to input
• Non D.A.L. system key operation
10 + 2
sin30
2
30 sin
You have to push the keys in a different
order than the actual equation, making the
input process confusing.
2-Line Display
A 2-line display allows the users to
check the equation and answer at
the same time. Because the
equation remains on display, it is
easy to edit or make substitutions if
necessary.
Multi-Line Playback
SHARP's Multi-Line Playback function lets you recall any of the last 142
steps you have made. This feature is very useful for
and
recalculating equations.
•
Comparative learning
Calculation A
(with parentheses)
Calculation B
(without parentheses)
The equations are different, but the answers are the same.
•
Edit and recalculate
Edit (sin to cos)
Calculation A
Recalculate
Calculation A'
Change the previous equation and recalculate.
Constant/Chain Calculations
Constant and Chain Calculation functions are popular in general
electronic calculators as they allow equations to be entered without
having to key repeatedly. Confusion may arise however, as not all
scientific calculators show the equation being equal to the answer in the
formula display. With SHARP's scientific calculators, the figures you omit
are automatically shown as K (constant) or ANS (answer). Contradictions
between equations and answers are eliminated and calculations are
easier and more logical to enter.
•
Constant Calculation
tan 30
10
5.773502692
tan 30
20
11.54700538
tan 30
50
28.86751346
Constant (K
)
•
Chain Calculation
2
2
3
+ 4
25 (3
+ 4
= 25)
ANS
5
Chain (ANS)
(Example using EL-506W.)
http://sharp-world.com/calculator/
http://sharp-world.com/calculator/
Greater Efficiency and Ease of Use
10 + 2
sin30 =
• D.A.L. system key operation
+
sin
1
0
2
3
0
=
You push the keys in the same order
as the actual equation.
Display Example
Equation
Answer
comparing formulas
▲
▼
5cm
x
30
y
sin30 = x / 5
x = 5 sin30
cos30 = y / 5
y = 5 cos30
A portion of the equation is
automatically memorised as a
constant, thus omitting redundant
input.
The answer can be used as is in
the next calculation.
Numerical Derivative/Integral
Simply enter numerical values following the interactive on-screen
instructions, and you can find the answer easily of derivative and integral
calculations. You don't have to re-enter the formula, and the calculation
can be repeated as many times as needed.
Equation y=x
2
•
Numerical Derivative
X=-2
dx=0.001
You can calculate the same derivative calculation repeatedly without having to input
the formula again.
•
Numerical Integral
[2, 3]
n=100
You can calculate the same integral calculation repeatedly without having to input the
formula again.
Formula Memory
Frequently used formulas or complex equations can be stored as
functions in Formula Memory*. By recalling the formula, you can
substitute new variables into the equation and recalculate it without
having to enter the entire sequence again. Since you can do repeat
equations, it's also convenient for simulations.
*Formulas up to 256 characters in length can be stored in F1–F4.
How to use it
(1) Store the equation into the calculator.
Note: Even when the power is off, the
equation will remain in memory until a new
equation is stored.
Solver Function
This function enables calculation of a variable in a given equation.
Other variables (a, b, c, etc.) must already be defined in order to
calculate .
Equation "sin – 0.5" (DEG)
Matrix Function
In addition to the four basic arithmetic functions (excluding division
between matrices),
3
,
2
, and
-1
, users are provided with transpose and
cumulative matrix functions, among others. Up to four matrices can be
saved in memory, each up to four rows by four columns in size.
1 2
3 1
mat A
mat B
3 4
2 6
mat A
mat B
▼
▼
▼
(2) Call up the equation.
r
(3) Use the equation to
calculate.
10
Cubic volume
(r=10)
of a sphere
▼
▼
7 13
17 27
14
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