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On a Casio calculator you can start a calculation with the key

=

Whenever you press this key after inputting values or an expression, the calculated result automatically updates answer memory contents by storing the result. A calculation is a tautology. In mathematics, this means that at the left and right of the equal sign (=) the same is stated.

 


Example 1

To calculate

 1  a b/c  2  +  1   ·   6  =  1 ┘2+1.6
         2.1

 


Example 2

To calculate 5 × −2 = −10

 5  × (−)  2  =  5×-2
         -10.

 


Example 3

To calculate sin (90°) = 1

sin  9   0  =  sin 90
           1.

 


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