HP 48g Graphing Calculator - Manual (Page 145)

Hyperbolic Functions
Hyperbolic functions are found in the MTH HYP menu ( ( M T H )
H Y P ).
Key Prograiniiiable Description
Command
( M T H ) H Y P ;
S I N K SINH Prefix. Hyperbolic sine: (e'^ - e“'0/2.
Fi S I h! ri ASINH Prefix. Inverse hyperbolic sine: sinli”'^
COS l-i COSH
ti- •
Prefiix. Hyperbolic cosine: [e^ p e^^)/'2.
fi
C
0 S i"i ACOSH Prefix/:. Inverse hyperbolic cosine:
cosh~'-
X .
I H r-4 TANH Prefix. Hyperbolic tangent:
sinh .'c/cosh
I .
M T' p i-j ATANH Prefix. Inverse hyperbolic tangent:
sinh^^(,r/\/]0- ;r-).
EXPM Prefix,
e ' "
— 1. Argument x is in level 1.
(EXPM is more accurate than EXP
when the argument to e'’’ is close to 0.)
LNPl Prefix. In (;r -f 1). Argument x is in
level E (LNPl, In plus 1, is more
accurate than LN when the argument to
In is close to 1.)
12
Functions of Real and Complex Numbers 12-3