Chapter 3: Basic Calculations — Basic Keyboard

eRecalls the previous entry. This is useful when you want to modify the previous entry, rather than reenter the whole expression over.

Example

Calculate 4 6.

4 6 E

Next, calculate 4 8.

@eB8 E

Note: Executed expressions are stored in a temporary memory in the executed order. If the temporary memory is full, the oldest data is automatically deleted. Be aware that emay not function on these occasions.

A maximum of 160 bytes can be stored in the temporary memory. The capacity may vary when there are division codes between expressions.

When switching from equation edit mode to one-line edit mode in the SETUP menu, all the numerical and graph equations stored in the temporary memory are cleared and cannot be recalled.

$ Enters “pi”. Pi is a mathematical constant, representing the ratio of the circumference of a circle to its diameter.

Example

Enter “2π”. (= 6.283185307) 2 @$E

jCalls up the CATALOG menu. From the CATALOG menu, you can directly access various functions in the menus.

Functions are listed in alphabetic order.

Move the cursor using the {/}keys and press E to access or enter the function.

Press Aand an appropriate alphabetic key (A to Z) to navigate the catalog.

Press A+ {/}to scroll the catalog page by page and press @+ {/}to jump to the beginning or the end of the catalog.

See page 246 for details.

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Sharp EL-9900 operation manual Example

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.