EC-4042  (650-0821)              Display               Faxback Doc. # 3743

The Display Indicator

Indicator                               Meaning

M1, M2,                                 The specified memory (1,2, or 3)
M3                                      contains a value other than zero.

2nd                                     The calculator will access the
                                        second function of the next key
                                        pressed.

HYP                                     The calculator will access the
                                        hyperbolic function of the next
                                        key sequence you press.

SCI,ENG                                 The display format is set to
                                        scientific (SCI) or engineering
                                        (ENG) notation.

FIX                                     A fixed-decimal setting is in
                                        effect.

STAT                                    The statistics registers contain
                                        data.

DEG, RAD,                               The angle unit is set to degrees
GRAD                                    (DEG), radians (RED), or grads
                                        (GRAD).

x                                       The entered coordinates have been
                                        converted to rectangular, and the
                                        x-coordinate is displayed.

r                                       The entered coordinates have been
                                        converted to polar, and r-
                                        coordinate is displayed.

()                                      One or more parentheses are open.

*                                       Two or more parentheses are open.

Error                                   An error has occurred.  You must
                                        press ON/C or OFF to clear the
                                        error and all pending operations.

Display Formats

You can enter a value in any format, regardless of the selected display
format.

2nd [SCI]                   Select a scientific notation as the display
                            format and turns on the SCI indicator.
                            Results are "normalized"(with one digit to
                            the left of the decimal point).

2nd [ENG]                   Selects engineering notation as the display
                            format and turns on the ENG indicator.
                            Results are normalized so that the exponent
                            is a multiple of 3.

2nd [FLO]                   Restores standard notation (floating-decimal)
                            display format and turns off the SCI or ENG
                            indicator.

                            Results outside the range

                             -9999999999 to 0.000000001,
                            0-
                            0.000000001 to 9999999999
                            are automatically displayed Scientific
                            notation.

2nd                         Sets the number of decimal places
[Fix] n                     displayed in results, and turns on the FIX
                            indicator.  n can be 0 through 9.  The setting
                            affects all decimal results and the mantissa 
                            of scientific-and engineering-notation
                            results.

                            Results are rounded or padded with trailing
                            zeros as necessary to fix the selected
                            setting.

2nd                         Removes the fixed-decimal setting and turns
[FIX] .                     the FIX indicator off.

Entering Numbers in Scientific or Engineering Notation

1.  Enter the mantissa (up to 10 digits).  If it is negative press +/-
    after entering the mantissa.

2.  Press EE and enter the exponent (one or two digits).  If it is
    negative, press +/- either before entering the exponent.

    If you press an incorrect digit key, re-enter the correct digits.
    (The calculator uses only the last two digits entered as the
    exponent.)

Note:  Entering a number in scientific or engineering notation does not
       change the display-format setting.

Calculation and Display of Results

Results are calculated to 12 digits internally and rounded in the display
to 10 digits (or 10 plus a 2-digit exponent).

Results whose absolute values are less than 1.0E-99 are set to zero, with
no error.  Results whose absolute values are greater than 9.999999999E99
are treated as overflow, and an error occurs.

You can control the order of calculations by using parentheses to group
parts of an expression that you want evaluated as a unit.

Square Root                          Calculates the square root of the
                                     displayed value.

2nd [square root]                    Calculates the cube root of the
                                     value.

1/x                                  Calculates the reciprocal (x-1) of
                                     the displayed value.

(LB/all-03/01/94)