Texas Instruments TI-89 Titanium CAS Graphing Calculator
graphing Calculator,Large 100 x 160 pixel display, 2.7 MB flash memory, graphing calculator handles,Calculus, algebra, matrices, and statistical functions
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About Texas Instruments TI-89 Titanium CAS Graphing Calculator
Overall Feedback:
79% positive
69% liked the long-lasting battery life, but 31% experienced sudden battery drain
With about 4 hours of use per week, I found that a fresh set of four Duracell batteries lasted for 6 months in my calculator.
I recommend buying a rechargeable battery kit for the calculator as it consumes a lot of battery life.
The calculator drains the batteries even when turned off.
69% found the button quality, but 31% encountered some lag
I find the titanium calculator to be heavier with a better feel and touch of the buttons compared to the other calculator.
The buttons are quiet and responsive. Over time, they can become occasionally stuck, but with proper care, there won't be any trouble with the input.
The buttons have a good tactile feedback and are well-arranged.
The buttons are quiet and responsive.
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71% praised the clear and bright display, while 29% found it hard to read in low light
The calculator's display is easy to read with its lite grey face-plate and color choices for notations.
The calculator's Pretty Print option is very helpful when inputting long formulas.
I am dissatisfied with the calculator's display. It is one of the worst I have seen in a monochrome Liquid Cristal Display. The TI-30XA has a bright clear LCD display that is visible from widely different angles.
The display can only be used in the best lighting conditions and is very dim.
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78% liked the durable material, but 22% found it flimsy
After 3 years of use, my calculator is still in good condition. The keycap labels are legible and with proper care, it will last for many years.
The TI-89 calculator is durable and can withstand drops, making it last for a long time.
I have given a 5-star rating for the sturdiness, value, and durability of the calculator, despite its 15-year-old technology.
The build quality of the product is amazing. It feels solid, the buttons click just the right amount, and the sliding cover is secure. The calculator can also withstand drops and will last for a long time.
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73% found the design comfortable and intuitive, while 27% found it awkward to hold
The graphical interface and resultant plotting system of this calculator are of high quality. The added features make it intuitive for the learning process.
The keyboard design is not like the ti-83 where you can press once to calculate sine, cosine, or tangent.
The screen design is terrible.
I desire improvements in the ergonomics design of the calculator, including a backlight, font size control, better key contrast, and a vertical scroll for the number entry box.
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