Texas Instruments TI-82 User Manual - Page 49
Keyboard Math Operations
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Keyboard Math Operations The most commonly used math functions are on the keyboard. Using Lists with Functions Functions that are valid for lists return a list calculated on an element-byelement basis. If two lists are used in the same expression, they must be the same length. + (Add), - (Subtract), ... (Multiply), à (Divide) + (addition Ã), - (subtraction ¹), ... (multiplication ¯), and à (division ¥) may be used with numbers, expressions, lists, or matrices (Chapter 10). valueA+valueB, valueA-valueB, valueA...valueB, valueAàvalueB Trig Functions The trigonometric functions may be used with numbers, expressions, or lists. They are interpreted according to the current Radian/Degree MODE setting. For example, sin 30 in Radian MODE returns M.9880316241; in Degree MODE it returns .5. sin value, cos value, tan value sin.1, cos.1, and tan.1 are the inverse trig functions (arcsine, arccosine, and arctangent). sin.1 value, cos.1 value, tan.1 value ^ (Power), 2 (Square), ‡ (Square Root) ^ (power ›), 2 (squared ¡), and ‡ (square root y ã‡ä) may be used with numbers, expressions, lists, or matrices (Chapter 10). value^power, value2, ‡value Note: Raising a negative number to a noninteger power can result in a complex number, which returns an error. .1 (Inverse) .1 (inverse -) may be used with numbers, expressions, lists, or matrices (Chapter 10).The multiplicative inverse is the equivalent of the reciprocal, 1àx. value.1 Math, Angle, and Test Operations 2-3