Texas Instruments TI-92 Owners Manual - Page 67

Tip: Editing an entry lets you make minor changes without retyping the entire entry. Using the equation A=pr2, use trial and error to find the radius of a circle that covers 200 square centimeters. The example below uses 8 as the first guess and then displays the answer in its approximate floating-point form. You can edit and reexecute using 7.95 and continue until the answer is as accurate as you want. On the TI.89: On the TI.92 Plus: 8§jR2Ë 8§R2Ë 2ãpäjRZ2 2TRZ2 ¸ ¸ ¥¸ ¥¸ Display Note: When the entry contains a decimal point, the result is automatically displayed in floating-point. A¥8 7.95¸ A¥. 7.95¸ Recalling a Previous Entry You can recall any previous entry that is stored in the history area, even if the entry has scrolled off the top of the screen. The recalled entry replaces whatever is currently shown on the entry line. You can then reexecute or edit the recalled entry. Note: You can also use the entry function to recall any previous entry. Refer to entry() in Appendix A. To recall: The last entry (if you've changed the entry line) Previous entries Press: 2² once 2² repeatedly Effect: If the last entry is still shown on the entry line, this recalls the entry prior to that. Each press recalls the entry prior to the one shown on the entry line. For example: If the entry line contains the last entry, 2 ² recalls this entry. If the entry line is edited or cleared, 2 ² recalls this entry. 50 Chapter 2: Operating the Calculator