To turn on your Ti-89 Titan, press and hold the "ON" button located on the top left corner of the calculator. The screen should light up and display the home screen.
To insert equations or formulas, simply use the appropriate keys on the calculator's keypad. For example, to insert a square root symbol, press the "2nd" button followed by the "√" button. To insert a fraction, press the "2nd" button followed by the "FRAC" button and enter the numerator and denominator as prompted.
To save your work, press the "F1" button followed by the "1: Save" option. This will bring up a menu where you can enter a name for your file and then save it to the calculator's memory or an external device.
To graph an equation, press the "F3" button followed by the "1: Graph" option. This will bring up a menu where you can enter your equation and choose the appropriate settings for your graph. Once you have entered your equation and settings, press the "ENTER" button to graph it.
To reset your Ti-89 Titan, press the "2nd" button followed by the "F1" button. This will bring up a menu where you can select the "7: Reset" option. Confirm the reset by pressing the "ENTER" button and your calculator will be restored to its factory settings.
