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| [[Texas Instruments]] '''TI-36''' is a series of [[scientific calculator]]s distributed by [[Texas Instruments]]. It currently represents the high end model for the TI-30 product lines.
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| The TI-36 model designation began in 1986 as variant of [[TI-35]] PLUS with solar cells.
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| ==TI-35 Plus/TI-36 Solar (1986)==
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| [[Image:TI35-Plus.JPG|thumb|1986 edition of TI-35 PLUS]]
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| [[Image:TI-36 Solar.jpg|thumb|TI-36 SOLAR, first edition]]
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| It can display 10 digits mantissa with 2 digits exponent, and calculates with 12-digit precision internally.
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| TI-36 SOLAR was based on 1985 version of TI-35 PLUS, but incorporates solar cells.
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| It addition to standard features such as trigonometric functions, exponents, logarithms, and intelligent [[order of operations]] found in TI-30 and TI-34 series of calculators, it also include base (decimal, hexadecimal, octal, binary) calculations, complex values, statistics. Conversions include polar-Cartesian coordinates, angles.
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| Other features include x-y exchange, percentage, register-current stack exchange, factorial, permutation/combination.
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| Maximum open parenthesis level is 15, with 6 pending operation stacks.
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| There are 2 operand registers (a, b) and 1 memory register.
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| TI-35 PLUS uses Toshiba T7767 processor, while TI-36 SOLAR uses Toshiba T7768 processor.
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| It was manufactured by Taiwanese company [[Inventec|Inventec Corporation]].
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| ===1989===
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| TI-35 PLUS now uses Toshiba T7767S. Cosmetic changes include black shell.
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| TI-36 SOLAR uses smaller solar cells, and cosmetic changes.
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| ==TI-35X/36X SOLAR (1991)==
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| [[Image:TI-36X_Solar_1993.jpg|thumb|TI-36X Solar, 1993 Revision]]
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| [[Image:Ti36x-solar-rev2004.png|thumb|TI-36X Solar, 2004 Revision]]
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| The design was based on the 1991 version of [[TI-68]], but without programming features and tilt screen, and only uses 7-segment LCD display. The double shift keys are remained.
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| Base calculations were updated to include logic operations (NOT, AND, OR, XOR, XNOR). Additional unit conversions include cm-in, litre-US galleon, kg-lb, Celsius-Fahrenheit, gram-ounce. There are 8 physical constants. Register count was increased to 3. New statistic modes include 2-variable statistics with linear regression.
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| Other new features include cubic root, fraction mode display and conversion (pure/mixed). Complex function was removed.
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| Stack levels are 15 open parentheses.
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| TI-35X uses Toshiba T6A58S, while TI-36X SOLAR uses Toshiba T6A57 processor.
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| ===1993===
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| It received cosmetic redesigns, which include rubber-like keys and rounder case.
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| ===TI-36X Solar (1996)===
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| It received cosmetic redesigns, which include recolored keys and labels, rounder case, solid plastic button. The bare processor is now attached directly on motherboard. TI-35 was since then discontinued.
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| ===TI-36 eco RS (1999)===
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| The design is based on 1996 version of TI-36X Solar, but was marketed to use recycled plastics for housing.
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| ===TI-36X SOLAR (2004)===
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| It was a cosmetic redesign for 1996 model, with design theme found in 2004 BA II PLUS Professional financial calculator and 2003 TI-1706SV arithmetic calculator.
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| ==TI-36X II (1999) (2-Line Displays)==
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| A prominent new feature is 2-line display, which includes a row of 11-character, 5x7-cell characters, used to display expressions entered by user. To complement the 2-line display, it also stores multiple expressions. The interface was streamlined to use shift menus to access most scientific functions. An expression can have up to 88 characters or items.
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| Internal precision was increased to 13 digits, while registers were increased to 5 for memory and 2 for expressions (up to 47 characters or items).
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| New arithmetic features include integer division.
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| New unit conversions (meter-foot, meter-yard, kilometer-mile, liter-UK galleon, kilometer per hour-meter per second), and 8 more physical constants were added (total 16 constants, 10 conversion pairs). Pi constant was also added.
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| New 2-variable statistic regression models include natural logarithm, exponent, power. Up to 42 sample points or pairs can be stored.
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| In base calculation, binary base was removed.
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| Complex function was restored. Supported functions include conjugate, real/imaginary component, absolute value.
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| Other new functions include integral calculation ([[Simpson's Rule]], max 99 intervals), random number generators (0-1 real, integer).
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| Stacks were increased to 23 pending operations, 8 pending values.
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| Cosmetic changes include a [[D-pad]] and a restyled case.
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| ===2004===
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| It was a cosmetic redesign of the 1999 model. Changes include new coloured keys and screen frame.
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| It was manufactured by [[Nam Tai Electronics]].
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| ==TI-36X Pro (2011) (Multi-Line Displays)==
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| {{multiple image
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| | align = right
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| | direction = horizontal
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| | footer = The TI-36X Pro (2011) displaying its programming bug, with incorrect answers (left), and the correct answers after a reset (right).
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| | footer_align = left
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| | image1 = TI-36X Pro (2011)2.jpg
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| | width1 = 150
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| | image2 = TI-36X Pro 2011.jpg
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| | width2 = 150
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| }}
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| 2011 brought a significant overhaul to the TI-36 series called the [http://www.datamath.org/Sci/Modern/TI-36X-PRO.htm TI-36X Pro]. This model incorporates the multi-line dot matrix display already used in the TI-30 and 34 MultiView series calculators. This display allows the calculator to perform numeric derivatives and integrals in a way similar to the much more advanced TI-83 series graphing calculators.
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| Maximum expression length is reduced to 80 characters.
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| Registers were increased to 8 for memory, 1 for formula (44 characters), and can store up to 3 list formulas (up to 42 characters or items).
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| Physical constants are increased by 4 to 20, conversion sets are increased to 40 (20 pairs).
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| Binary mode is restored for Base calculation.
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| Other new functions over TI-36X II include:
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| *Math: Least common multiple, Greatest common divisor, Prime factors (from TI-Collège Plus), Summation, Product
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| *Number functions: Rounded value, iPart(Integer part of a number), fPart(Fractional part of a number), int(Greatest integer smaller or equal to the number), min(Minimum of two numbers), max(Maximum of two numbers), mod(Modulo)
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| *Calculus: numeric derivative (symmetric difference quotient method)
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| *2-variable statistics: quadratic and cubic regressions
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| *Distribution functions: normal probability density function at mean=0 and sigma=1 (f(x), probability between x boundaries), inverse cumulative normal distribution function for a given area under the normal distribution curve with user-specified mean and standard deviation, probability at x for the discrete binomial distribution with user specified trial number and probability of success per trial, cumulative probability at x for binomial distribution with specified trial number and probability of success per trial, probability at x for Poisson distribution with the specified mean, cumulative probability at x for Poisson distribution with the specified mean
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| *Statistics results: Minimum/maximum of x values, 25/75-percentile (from TI-Collège Plus)
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| *Function table: formula-based generator, manual table
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| *Matrix: 3 editable tables, preset 2x2 and 3x3 identity matrices, matrix arithmetic (addition, subtraction, scalar/vector multiplication, matrix-vector multiplication (vector interpreted as column))
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| *Vector: 3 editable tables, preset last matrix/vector result, vector arithmetic (addition, subtraction, scalar multiplication, matrix-vector multiplication (vector interpreted as column)), dot product, cross product, unit vector
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| *Polynomial solver: 2nd/3rd degree solver.
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| *Linear equation solver: 2x2 and 3x3 solver.
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| *Base-N operations: XNOR, NAND
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| *Expression evaluation
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| *Complex numbers: polar coordinates entry, polar/Cartesian display mode, angle for complex number
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| ===Programming errors===
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| The TI-36X Pro is an updated version of the European model, the [http://www.datamath.org/Sci/Modern/TI-30X-PRO.htm TI-30X Pro MultiView], which was taken off the market shortly after its release in 2010 for programming errors.<ref>{{Cite web | last = Woerner | first = Joerg | title = Texas Instruments TI-36X Pro | work = DataMath Calculator Museum | date = June 2, 2011 | url = http://www.datamath.org/Sci/Modern/TI-36X-PRO.htm | accessdate = October 18, 2011}}</ref><ref>{{Cite web | last = Northrup | first = Laura | title = This Texas Instruments Calculator Can't Calculate Correctly | work = The Consumerist | date = September 29, 2011 | url = http://consumerist.com/2011/09/this-texas-instruments-calculator-cant-calculate-correctly.html | accessdate = October 18, 2011}}</ref><ref>{{Cite web | title = TI-36X Pro Review | work = Eddie's Math and Calculator Blog | date = April 27, 2011 | url = http://edspi31415.blogspot.com/2011/04/ti-36-pro-review.html | accessdate = October 18, 2011}}</ref> While the 30X's bugs were fixed for the relaunch as the 36X, the updated version contains a notable software bug of its own, where it displays [[Fraction_(mathematics)#Mixed_numbers|mixed numbers]] involving <math>\pi</math> incorrectly.<ref>http://www.youtube.com/watch?v=pVyXz8ZvY8s</ref><ref>{{Cite web | title = TI-36X PRO: Programming Bug | work = Nick Weil's Blog | date = January 17, 2012 | url = http://nickweil.blogspot.com/2012/01/ti-36x-pro-programming-bug-info-video.html | accessdate = January 23, 2012}}</ref> In such cases, the display shows <math>\pi</math> in the numerator of the fraction, instead of as a separate [[coefficient]].
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| For example, while in MathPrint mode, entering: <math>\pi 12.5^2</math> with result displayed as a partial fraction yields: <math>156{\pi \over 4}</math>, while the correct display would be: <math>(156{1 \over 4})\pi</math>. The [[rational function]] is given correctly, in this case: <math>{625 \pi \over 4}</math>. Interestingly, the calculator stores the numerically correct result. In the previous example,
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| multiplying the incorrectly displayed result <math>156{\pi \over 4}</math> by <math>4</math> yields <math>{625 \pi}</math>, instead of <math>{156 \pi}</math>the equation would suggest.
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| It should be noted that [[radian]] measure does not use [[Fraction (mathematics)#Mixed numbers|mixed fractions]], by [[Convention (norm)|convention]].
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| To get around the bug:
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| *Type <math>12.5</math>
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| *Press [<>] [enter].
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| *Scroll up to highlight <math>25 \over 2</math> and press [enter]. The fraction will be copied to your current entry.
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| *Press [<math>x^2</math>] [<math>\pi</math>] to input <math>{25 \over 2}^2\pi</math>.
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| *Press [enter] and the calculator should display <math>{625 \pi \over 4}</math>.
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| As of February 2013, a fixed revision has not been released and the error is still present in all shipping TI-36X Pro calculators.
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| Some TI-36X Pro owners claim that the bug can be fixed by resetting the calculator when holding down [on] and [clear] at the same time. This is how the calculator in the picture was fixed.
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| ==Usages==
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| The TI-36X Solar is one of the few calculators <ref>http://www.ncees.org/About_NCEES/News/News_Pages/2010_approved_calculator_list_is_announced.php</ref> currently permitted for use on the [[Fundamentals of Engineering exam]]. TI offers other calculators eligible for use on the exam, the TI-30X and TI-36X series.
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| ==References==
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| {{Reflist}}
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| ==External links==
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| *[http://www.datamath.org Datamath.org, a museum of TI calculators]
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| {{TI-calc}}
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| {{DEFAULTSORT:Ti-36}}
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| [[Category:Texas Instruments calculators]]
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