Chapter 4: Basic Graphing Features — Basic Keyboard

f: The graph appearance can be set and verified under this menu. Press @fto access.

A– – – – – – Displays the current FORMAT settings. The default setting is:

OFF

(for the graph equation to be displayed

 

on the graph)

OFF

(for displaying numeric derivatives on

 

the graph)

ON

(for displaying the X/Y axis on the

 

graph)

OFF

(for displaying a grid on the graph)

BEXPRES This sets whether or not graph equations are displayed on the graph screen. To display the equations on the graph, select 1 ON by pressing 1at this menu item.

C Y’ The numeric derivative (dx/dy) can be displayed on the graph screen. To activate this function, select 1 ON by pressing 1at this menu item.

D AXIS The graph axis can be set invisible with this menu item. To hide the X/Y axis of the graph, select 2 OFF by pressing 2at this menu item.

E GRID The graph display can be backed with an X-Y grid. To show the grid on the graph, select 1 ON by pressing 1at this menu item.

Substitution feature

•The substitution feature allows you to input an equation using characters and variables, and then substitute numeric values for the characters to draw the graph.

•The substitution feature is valid only in the rectangular coordinate system. Using this feature, any number of numeric value sets can be substituted while referring to the graph drawing screen. This clearly shows the changes in the graph depending on numeric values.

For example, the graph for “Y1 = AX3 + BX2 + CX2 – D” is drawn by substituting numeric values for variables A, B, C, and D of the equation.

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Sharp EL-9900 operation manual Substitution feature
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EL-9900 specifications

The Sharp EL-9900 is a remarkable scientific calculator that exhibits a fusion of advanced features, cutting-edge technology, and an ergonomic design tailored for both students and professionals. One of the standout characteristics of the EL-9900 is its extensive range of functions, boasting over 550 built-in calculations that cover various mathematical and scientific disciplines. This calculator is particularly popular among engineering and physics students due to its ability to handle complex calculations with ease.

One of the key features of the EL-9900 is its 2-line display, which allows users to view both the input and the result simultaneously. This dual display enhances usability, especially when dealing with intermediate steps in calculations. The calculator also includes a built-in 12-digit LCD screen, which ensures clarity and precision in reading numbers, making it easier for users to work for extended periods without straining their eyes.

The EL-9900 is equipped with a wide array of mathematical functions, including trigonometric, logarithmic, and exponential functions. Notably, it supports fraction calculations, statistical analyses, and unit conversions. Its advanced programming capabilities, such as 36 programmable functions and the ability to store data, further enhance its functionality, allowing users to create custom calculations tailored to specific needs.

One of the more modern technologies incorporated into the EL-9900 is its solar-powered function, which is complemented by a battery backup, ensuring that the device remains operable in varied lighting conditions. This environmentally friendly design reduces the need for frequent battery replacements, making it a cost-effective choice for users.

In terms of design, the Sharp EL-9900 boasts a slim profile and lightweight construction, which makes it portable and easy to carry. Its durable casing ensures that it can withstand the rigors of daily use, whether in a classroom setting or a professional environment.

Overall, the Sharp EL-9900 stands out as a versatile scientific calculator packed with features designed to meet the needs of students and professionals alike. Its robust functionality, clear display, and user-friendly design make it a reliable tool for anyone engaged in mathematical and scientific pursuits. Whether used for basic calculations or advanced problem-solving, the EL-9900 remains a powerhouse in the realm of scientific calculators.
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