Then press the SHIFT till you get the AC.You will get a screen which shows, DIAGNOSTIC AC.Press SHIFT, ON, and 7 at the same time.While purchasing Casio fx-991 MS, check whether the product is original or duplicate by using these simple trick for checking original calculator or not.įollow these Commands in your Casio fx-991 MS. I have been using this Casio fx-991 MS whole of my Bachelor’s degree in Electrical and Electronics Engineering and I recommend you guys to go with this version. If you are using any other version from Casio don’t worry the basic functions and operations would be the same but the there be will a small deviation in keys and usage. In this module, I am going to work with the Scientific Calculator from Casio fx-991 MS for the demonstration purpose. In order to solve, higher-order problems theorems should be followed. For higher-order problems, scientific calculators cannot be used. Note: Scientific Calculators also have a certain limit. In the case of Scientific Calculator, we can solve complex equation (a+i b), Matrices, Logarithmic Problems, Trigonometric Problems and Problems involving iterations. The Normal Calculator consists of only four basic operations i.e Addition, Subtraction, Multiplication, and Division. The Scientific Calculator is an advanced version of an ordinary calculator which helps us to solve complex arithmetic problems.
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