Before diving into complex calculations, you need to ensure your calculator is in the right "state."
Press Shift -> 9 (CLR) -> 3 (All) -> EXE (Yes) -> AC . casio fx50fh ii manual hot
If your calculator starts acting strangely or showing "Syntax ERROR" on everything, a hard reset is often the only fix. Before diving into complex calculations, you need to
Use this for basic calculations, trigonometry, and logarithms. Before diving into complex calculations