Texas Instruments TI-30 Eco RS

The basic functions of the TI-30 Eco RS

• The basics are self-explanatory. With [ON / AC] you switch on the calculator and delete older arithmetic entries from the memory.
• You can carry out simple arithmetic operations as usual with the number field and the [+], [-], [x], [÷] and [=] keys. The key with + and - and the alternating arrows change the sign of the displayed value. You can nest more complicated terms with the [)] and [(] keys. The left arrow in the lower left corner deletes the last entered digit.
• The yellow button [2nd] activates the second function of a button that is specified above it. For example, if you want to work out the third root of 125, press [3] [2nd] [y^x].

Fractional and power calculations with Texas Instruments

• In order to calculate fractions you mainly need the key [a^b/_c]. If you enter only two values, the TI-30 Eco RS assumes a true fraction, for example [3] [a^b/_c] [4] the entry for ³/₄, 3³/₅ on the other hand, [3] [a^b/_c] [4] [a^b/_c] [5]. The second function [d / c] alternates between a real and an improper fraction.
• [F <> D] changes the display from a fraction to a decimal number.


Pocket calculator: Enter the logarithm on the TI 30 eco RS

A pocket calculator, including the TI 30 eco RS, is only ever as smart as the one who ...

• The third row of keys with the keys [¹/_x] for the reciprocal, [x²] for the quadrature and [√x] for the square root (as well as its second function [^x√y] for others root).

Trigonometry and logarithms

Now we're gradually getting into the area where the Texas Instruments TI-30 Eco RS is ahead of other pocket calculators.

• The row of keys above is mainly used for trigonometric functions: [SIN] for sine, [COS] for cosine and [TAN] for tangent. The second function is always the reverse of the function. In this context, the [DRG] key and its second function are also of interest, which shows the displayed angle value as degrees, grads or radians.
• [LOG] and [LN] are for logarithmic calculations, the first key for the 10th logarithm, the second for the natural logarithm. Correspondingly, the second functions are again the inversions [10^x] or [e^x].
• [Sto] saves the displayed value, [RCL] calls it up again. You can save several values ​​at the same time by assigning memory locations to them, for example [STO] [3] saves the displayed value in memory location 3, [RCL] [3] calls it up again.

With the TI-30 Eco RS, Texas Instruments offers you one calculatorthat over all Functions that you may encounter outside of a mathematical institute.