There could be several reasons for this issue. First, make sure that the function is entered correctly and all necessary parentheses and brackets are included. Also, check the window settings to ensure that the graph is not being cut off. If the function is very complex or has multiple parts, it may exceed the graphing capabilities of the TI-89.
A "Math Error" on the TI-89 usually means that the function is undefined at certain points or has an invalid input. Check the function for any potential errors or undefined points, and make sure all necessary variables are defined. You may also need to adjust the window settings to view the entire graph.
Yes, the TI-89 has the capability to graph parametric and polar equations. You will need to use the "Parametric" or "Polar" function in the "Y=" menu to enter the equation in the correct format. You can also adjust the window settings to view the entire graph.
This could be due to the window settings being too small or not including the entire range of the function. Adjust the window settings to include the entire range of the function, or use the "Zoom" function to automatically adjust the window.
You can reset the TI-89 by pressing the "2nd" button followed by the "6" button, and then selecting "F1" to reset all settings. This will erase any custom settings and return the calculator to its default settings.