Scientific Calculators

The calculator examples is the Texas Instruments TI-89 of Fig. 1.

Fig. 1
Texas Instruments TI-89 calculator

It can operate on complex numbers and determinants.

Initial Settings
 - Set the engineering notation.
- Set the accuracy level to two places (fixed-point).
- Set the approximate mode, the solution should be in decimal form to second-place accuracy. If this is not set, some answers will appear in fractional form to ensure the answer is exact.
- Set clear screen to clear the screen of all entries and results.