## Saturday, September 26, 2020

### Retro Review: TI-36 Solar

Retro Review:  TI-36 Solar

Just the Facts:

Model:  TI-36 Solar

Company: Texas Instruments

Type: Scientific

Display:  10 digit with 2-digit exponents

Battery:  Solar

Logic: AOS

Memory Registers: 1

Years: 1984-1990

Features:

*  Complex Number Arithmetic

*  Rounding Numbers (to fixed number setting)

*  Base Conversions

*  Normal Distribution

*  Single-Variable Statistics

Examples with Complex Numbers

MODE 5:  CPLX

There are two separate registers to hold parts of complex numbers:

[ a ]:  Real part (rectangular),  Radius (polar)

[ b ]:  Imaginary part (rectangular), Angle (polar)

Example 1:  (4 + 3i) * (11 - 2i)

4 [ a ] 3 [ b ] [ × ] 11 [ a ] 2 [ +/- ] [ b ] [ = ]

Display:  50

Press [ b ], Display:  25

Result:  50 + 25i

Example 2:  Convert 3 + 2.4i to polar form, degrees

3 [ a ] 2.4 [ b ] [ INV ] (R>P)

Display:  3.841874542

Press [ b ],  Display:  38.65980826

3 + 2.4i = 3.841874542 ∠ 38.65980826°

Examples with Normal Distribution

MODE 6:  STAT

There are three functions that determine the area under the normal distribution curve:

P(t) from - ∞ to t,  lower tail curve

R(t) from 0 to t

Q(t) from t to ∞, upper tail curve

Note that for any t, P(t) + Q(t) = 1.

Also note that P(t), R(t), and Q(t) will operate on the standard normal curve, where μ = 0 and σ = 1, regardless of the amount of data points entered in Statistics mode through Σ+.

For z = t =2:

2 [ INV ] ( P(t) ) returns 0.97725

2 [ INV ] ( R(t) ) returns 0.47725

2 [ INV ] ( Q(t) ) returns 0.02275

Comparison:  TI-36 Solar vs. TI-35 Plus

The TI-36 Solar and TI-35 Plus have the same set of functions and features.  You can see my retro review from 2017 of the TI-35 Plus here:  http://edspi31415.blogspot.com/2017/09/retro-review-texas-instruments-ti-35.html

There are several keyboard differences:

Shift key is marked [ INV ] (with 2nd above it) for the TI-36 Solar, and the shift key is marked [ 2nd ] for the TI-35 Plus.

The equals key is twice in vertical height, covering the spans of the bottom two rows on the TI-35 Plus.

The top three rows* (all of the shift markings remain intact):

TI-36 Solar:

[CE/C] [ 1/x ] [ a ] [ b ] [ AC ]

[ hyp ] [ sin ] [ cos ] [ tan ] [ DRG ]

[ INV ] [ x^2 ] [ log ] [ ln x ] [ y^x ]

TI-35 Plus:

[ 2nd ] [ x^2 ] [ log ] [ ln x ] [ OFF ]

[ hyp ] [ sin ] [ cos ] [ tan ] [ DRG ]

[ y^x ] [ 1/x ] [ a ] [ b ] [ ÷ ]

The [ hyp ] key has the hyp^-1 label over it on the TI-35 Plus.

*not counting the [ON/C] key above all the rows on the TI-35 Plus

Comparison:  TI-36 Solar vs. the original TI-36X Solar

Here is my review from 2018 for the TI-36X Solar:  http://edspi31415.blogspot.com/2018/09/retro-review-texas-instruments-ti-36x.html

The TI-36X Solar:

*  does not have the complex arithmetic mode of the TI-36 Solar

*  adds the Boolean functions AND, OR, XOR, XNOR, and NOT to the BIN, OCT, and HEX mode

*  adds a second shift key, [ 3rd ]

*  there is no [ MODE ] key, every mode is selected through [ 3rd ] (key) combos

*  adds 8 scientific constants and 10 metric/US conversions

Verdict

Like the TI-35 Plus, the TI-36 Solar is a step up from the TI-30 series (1980s versions of TI-30).   Again, the TI-34 (1987) has the Boolean functions and fraction functions that the TI-36 Solar doesn't.  You don't have to worry about batteries at all since the TI-36 Solar runs entirely on solar/light power.

Eddie

All original content copyright, © 2011-2020.  Edward Shore.   Unauthorized use and/or unauthorized distribution for commercial purposes without express and written permission from the author is strictly prohibited.  This blog entry may be distributed for noncommercial purposes, provided that full credit is given to the author.

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