Sharp electronic calculator manual Greater Efficiency and Ease of Use

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Greater Efficiency and Ease of Use

Direct Algebraic Logic (D.A.L.) Numerical Derivative/Integral

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 10 + 2 sin30 =

• Non D.A.L. system key operation

• D.A.L. system key operation

10 + 2 sin30	1 0 + 2	sin 3 0 =
2 30 sin

You have to push the keys in a different	You push the keys in the same order
order than the actual equation, making the	as the actual equation.
input process confusing.

2-Line Display

A 2-line display allows the users to		Display Example
check the equation and answer at	Equation
the same time. Because the
	Answer
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 comparing formulas 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			5cm
				x
	Recalculate	30	y
Calculation A'		sin30 = x / 5	x = 5	sin30
		cos30 = y / 5	y = 5	cos30

Change the previous equation and recalculate.

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=x2

•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.	(2) Call up the equation.	r
	(3) Use the equation to
Note: Even when the power is off, the	calculate.
equation will remain in memory until a new	10	Cubic volume
equation is stored.
	(r=10)	of a sphere

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)

Scientific Calculators

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	A portion of the equation is
			automatically memorised as a
tan 30	50	28.86751346	constant, thus omitting redundant
			input.
		Constant (K	)

•Chain Calculation

3 + 4 25 (32 + 42 = 25)

ANS	5	The answer can be used as is in
		the next calculation.
		Chain (ANS)

(Example using EL-506W.)

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	mat A	3 1	mat B
3 4		2 6
mat A mat B			▼	▼	▼
		▼	▼
				7	13
				17	27

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