# Real Number Functions - HP 50g User Manual

Graphing calculator.

Note: To see additional options in these soft menus, press the L key or the
„«keystroke sequence.
For example, to calculate tanh(2.5), in the ALG mode, when using SOFT menus
over CHOOSE boxes, follow this procedure:
„´
) @ @HYP@
@@TANH@
2.5`
In RPN mode, the same value is calculated using:
2.5`
„´
) @ @HYP@
@@TANH@
As an exercise of applications of hyperbolic functions, verify the following
values:
SINH (2.5) = 6.05020..
COSH (2.5) = 6.13228..
TANH(2.5) = 0.98661..
EXPM(2.0) = 6.38905....
Once again, the general procedure shown in this section can be applied for
selecting options in any calculator menu.

## Real number functions

Selecting option 5. REAL.. in the MTH menu, with system flag 117 set to
CHOOSE boxes, generates the following menu list:
Select the TANH function
Evaluate tanh(2.5)
Enter argument in the stack
Select the TANH function
ASINH(2.0) = 1.4436...
ACOSH (2.0) = 1.3169...
ATANH(0.2) = 0.2027...
LNP1(1.0) = 0.69314....
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