Domain problems happen when an input is not valid for the requested operation.
Why it happens
Domain problems happen when an input is not valid for the requested operation.
Suggested steps
- Check whether the input is mathematically allowed.
- Review number mode and angle mode if relevant.
- Simplify the problem conceptually before retrying.
Independent note
This explanation is written for an independent TI-84 style practice environment and should be treated as educational troubleshooting guidance.