Casio FX-991ES User Guide - Page 13

Example: sin 30 = LINE s30)= Pressing s inputs "sin(". • Note that the input procedure is different if you want to use Math format. For more information, see "Inputting with Math Format". Omitting the Multiplication Sign You can omit the multiplication sign (×) in any of the following cases. • Before an open parentheses (( ): 2 × (5 + 4), etc. • Before a function with parenthesis: 2 × sin(30), 2 × '(3), etc. • Before a prefix symbol (excluding the minus sign): 2 × h123, etc. • Before a variable name, constant, or random number: 20 × A, 2 × π, 2 × i, etc. Final Closed Parenthesis You can omit one or more closed parentheses that come at the end of a calculation, immediately before the = key is pressed. For details, see "Omitting a Final Closed Parenthesis". Displaying a Long Expression The display can show up to 14 characters at a time. Inputting the 15th character causes the expression to shift to the left. At this time, the ] indicator appears to the left of the expression, indicating that it runs off the left side of the screen. Input expression: 1111 + 2222 + 3333 + 444 Math Displayed portion: Cursor • When the ] indicator is displayed, you can scroll left and view the hidden part by pressing the d key. This will cause the ' indicator to appear to the right of the expression. At this time, you can use the e key to scroll back. Number of Input Characters (Bytes) • You can input up to 99 bytes of data for a single expression. Basically, each key operation uses up one byte. A function that requires two key operations to input (like 1s(sin-1)) also uses only one byte. Note, however, that when you are inputting functions with Math format, each item you input uses up more than one byte. For more information, see "Inputting with Math Format". E-11