
Yes, you can easily switch between degree and radian modes on your CTIFREE FX-991MS scientific calculator. Here's how: First, press the "MODE" button on the calculator. Then, use the arrow keys to navigate through the mode options until you find the angle unit settings. Next, press the key that corresponds to angle unit settings, often labeled as "DRG" or similar, to toggle through the available options: degrees (DEG), radians (RAD), and sometimes gradients (GRAD). Finally, after selecting your desired unit, press the "MODE" button once more to exit the mode selection. For more detailed visual instructions specific to your calculator's model, consult the CTIFREE FX-991MS user manual, as slight variations in button labels or navigation may exist.


