20 Most Recent Casio Model Dl-250la Heavy Duty Black/red Printing Calulator W/11 Rolls Paper - Page 5 Questions & Answers

Hour, Minute, Second

Look for the DMS key (degree, minute second).

Try to understand the theory from your math books. Do some examples. Then try to use the calculator.

Your angle unit is set to radians, while on the other calculators it is in degrees. Change the angle unit to degrees.

You cannot. It is just a scientific calculator not a scientific graphing calculator.

From the original manual of the SF 4000 "If you forget your password, there is no way to recover it or to access the Secret data. You can only Reset to clear the entire memory and start again. To change an existing password, enter Secret mode and then press Clear and then the Secret key. The password XXXXX appear. Press Function then select 1 - Edit to edit the password, then press the Secretkey again when finished editing to save the change. The data item editing menu has an option to move individual items in or out of Secret mode"

To set a Tax Percent rate, first, turn the calculator OFF and then turn it ON. Press and hold the [%]key.

I rekon ya over load it now by bashing the ca button. try removing the battery, leave it out fer 5 minutes the put it back in then hold the power button down for 5 seconds for a hard reset and it it should be good to go...

Press the Shift/Mode key and set the Input/Output to MathIO. Even that will not guarantee that the display will be in root form. Only square roots are possible.

You cannot. It is not a graphing calculator.

Press the Shift Mode button and select LineIO instead of MathIO. MathIO shows you the result as a stacked fraction (with numerator on top of Denominator), which is rather neat.

No, we actually have not one part for any product at all. We are an information service only. Please type your needs into the search engine of your computer and see if there is a dealer who can help you. God bless your efforts.

Page 46 of the scanned copy of the manual or near by pages describes an all clear procedure that unfortunately for you deletes all data if the password is unknown. https://www.manualslib.com/manual/358559/Casio-Sf-4000.html CASIO SF 4000 Operation Manual

I suggest you play with key combinations (Shift + some key) to discover if there is any beautiful template that gets generated by it.

Change the output display to MathIO. You may be able to display square roots only: so no cube roots, nor fourth...

You are supposed to do Venn diagrams by hand. If you think you need a calculator for that, then you do not understand what Venn diagrams are.

I don<t think you can. Even if you could, you would not be able to find a solution. You need three equations in three unknowns. You only have two.