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The TI-30x IIS boast advanced features such as two-line display. The display shows the equation you are creating on the top line, and the numbers or symbols you are currently entering on the second line. Once the equation is solved, the results are displayed on the second line, and you can use the four arrow keys on the front of the calculator to edit the original equation in any way you like for a recalculation. Better still, pressing the up arrow repeatedly lets you browse through a cache of dozens of previous calculations, meaning you can look back to see the answer to a problem you solved two minutes ago, two days ago, or whenever.
Scientific Calculator retains previous entries, memory values, and individual statistical elements. Ideal for general math, algebra, trigonometry, statistics, science and much more. View entry and results at the same time. Edit current entry. View and edit previous entries. Five variable memories. Two variable statistics. Enter/delete/insert/edit individual statistical data elements. Trigonometric functions in degrees and radians. Common and natural logarithms. Fractions and fraction/decimal conversions. Degrees, minutes, seconds/decimal degree conversions. Universal powers and roots. Reciprocals and factorials. Grads and hyperbolics. Polar/rectangular conversions. Dual power.