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The TI 25X Solar Calculator
The TI 25X Solar calculator offers you a wide range of
mathematical and statistical capabilities. This manual
explains these capabilities.
Basic Operations
To turn the calculator on, expose the solar panel to
adequate light and press
Key
Function
([
])
If the calculator is off, turns the unit on,
ON
clears the display, and resets angle units to
degrees.
When pressed once during a calculation
(but before an operation key), clears the
displayed entry and any error condition (E).
You can make a new entry and continue
with your calculation.
Pressing
statistics register, or angle-unit setting.
Instructs the calculator to perform the
second function (written above the key) of
the next key pressed.
([
]).
ON
does not clear the memory,
1 ENG
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Table of Contents
Related Manuals for Texas Instruments TI-25X Solar
Summary of Contents for Texas Instruments TI-25X Solar
- Page 1 The TI 25X Solar Calculator The TI 25X Solar calculator offers you a wide range of mathematical and statistical capabilities. This manual explains these capabilities. Basic Operations To turn the calculator on, expose the solar panel to adequate light and press...
- Page 2 Angle units are set to radians. Angle units are set to grads. One or more parentheses are open. STAT The calculator is in statistics mode. That is, the statistics register contains data. A number and operation are stored as a constant.
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Page 3: Scientific Notation
Scientific Notation In scientific notation, a number is expressed as a mantissa multiplied by 10 raised to a power (exponent). mantissa floating mantissa sign Function Example: To enter 1.2345 × 10 1.2345 Removes a displayed result from scientific notation and displays it in standard decimal format. - Page 4 Order of Calculations The Algebraic Operating System (AOS™) of the TI 25X Solar completes operations in the order of priority listed below. 1. Single-variable functions (trigonometric, logarithmic, square, square root, factorial, percent, reciprocal, angle conversion, and change sign).
- Page 5 Basic Functions Function Perform addition, subtraction, multiplication, and division. Example: 12 Completes all pending operations. Example: 4 Changes the sign (positive or negative) of the displayed number. Example: 8 Operations enclosed in parentheses are given priority over operations outside the parentheses.
- Page 6 Function Calculates the square of the displayed number. Calculates the square root of the displayed number. Calculates the reciprocal (x ) of the displayed number. Raises the displayed number (y) to a specified power (x). Calculates a specified root (x) of the displayed number (y).
- Page 7 Using the Memory The calculator’s memory can store data as long as the calculator is on. You can store a number in memory for repeated use in a calculation or to keep a running total. Function Stores the displayed number in memory, replacing any previously stored number.
- Page 8 Takes the mth root of each subsequent entry. After storing the constant, you can complete each repeated calculation by simply entering the new number and pressing . To erase the constant, clear the calculator or enter any of the above arithmetic keys. 8 ENG...
- Page 9 Angle-Unit Setting Before starting a trigonometric calculation, use the to select the appropriate angle-unit setting (D—Degree, R—Radian, or G—Grad). Function Changes the angle-unit setting without affecting the displayed angle value. Changes the angle-unit setting and converts the displayed angle value to its equivalent for the new setting.
- Page 10 Degree Format Conversions An angle measured in degrees, minutes, and seconds (DMS) must be converted to decimal degrees (DD) before you can use it in a calculation. Degrees, Minutes, and Seconds DMS angles are entered in D.MMSSsss format. Degrees ( )—0 to 8 digits Decimal point separator Minutes (')—must be 2 digits Seconds (")—must be 2 digits...
- Page 11 Converting Angle-Measurement Format The TI 25X Solar can easily convert an angle measurement from one degree format to the other. Function Converts the displayed value from DMS DD degrees, minutes, and seconds (DMS) to decimal degrees (DD). Enter the angle in D.MMSSsss format.
- Page 12 Rectangular-to-Polar Conversions Pressing ] converts rectangular coordinates (x,y) to polar coordinates (r, ). Example: Convert the rectangular coordinates (10, 8) to polar coordinates. Comments Keystrokes Enter x and y Value of Value of r Value of To alternate between the two converted values (r and ), press repeatedly.
- Page 13 Statistics Functions The TI 25X Solar can perform statistical analysis on one- variable data. Function Enters the displayed number into the statistics register as a data point. Removes the displayed number from the statistics register. Calculates the mean of the entered data.
- Page 14 Example: Analyze the following test scores. Assume that the four students are the entire population: 96, 81, 87, 70. Comments Clear display Clear register 1st entry 2nd entry 3rd entry (incorrect) 3rd entry (removed) 3rd entry (correct) 4th entry Mean (class average) Standard Deviation Variance Important: Remember to press...
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Page 15: Error Conditions
Check to be sure that no part of the solar panel is covered. Check the intensity of the light source. The light may be too dim to operate the calculator. 2. Press and try the calculation again. Review the operating instructions to be certain the calculations were performed properly. - Page 16 TI Product and Services Information For more information about TI products and services, contact TI by e-mail or visit the TI calculator home page on the world-wide web. e-mail address: internet address: Service and Warranty Information For information about the length and terms of the warranty...