HP 50g User Manual page 140

The result is:
The operations shown above assume that you are using the default setting for
system flag 117 (CHOOSE boxes). If you have changed the setting of this flag
(see Chapter 2) to SOFT menu, the MTH menu will show as labels of the soft
menu keys, as follows (left-hand side in ALG mode, right –hand side in RPN
mode):
Pressing L shows the remaining options:
Note: Pressing „«will return to the first set of MTH options. Also, using
the combination ‚˜ will list all menu functions in the screen, e.g.
Thus, to select, for example, the hyperbolic functions menu, with this menu
format press ) @ @HYP@ , to produce:
Finally, in order to select, for example, the hyperbolic tangent (tanh) function,
simply press @@TANH@.
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