Texas Instruments TI-80 User Manual - Page 52
Keyboard Math Operations
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Keyboard Math Operations The most commonly used math functions are on the keyboard. The keyboard math operations can be used with decimal numbers, fractions (except as noted), expressions, and lists. + (Add) - (Subtract) × (Multiply) à (Divide) The basic arithmetic functions are: addition «, subtraction |, multiplication p, and division e. Each argument for these functions can be a list. valueA+valueB, valueAìvalueB, valueA×valueB, valueAàvalueB Trig Functions The trigonometric functions are interpreted according to the current RADIAN/DEGREE mode setting. (Refer to page 1-9 for instructions on changing the mode setting.) For example, SIN 30 in RADIAN mode returns L.9880316241; in DEGREE mode, it returns .5. Each argument for the trigonometric functions may be a list. SIN value, COS value, TAN value SINê, COSê, and TANê are the inverse trig functions (arcsine, arccosine, and arctangent). SINê value, COSê value, TANê value RADIAN Mode ê (Inverse) ê (inverse, V) may be used with numbers, expressions, or lists. The multiplicative inverse is the equivalent of the reciprocal, 1àx. valueê 2-4 Math, Angle, and Test Operations