HP 40G manual Constants, Hyperbolic trigonometry

Constants

	The HP 39G/40G has an internal numeric representation for
	these constants.
e	Natural logarithm base. Internally represented as
	2.71828182846.
	e
i	Imaginary value for √−1 , the complex number (0,1).
	i
MAXREAL	Maximum real number. Internally represented as
	9.99999999999 x 10499.
	MAXREAL
MINREAL	Minimum real number. Internally represented as 1 ⋅ 10– 499 .
	MINREAL
π	Internally represented as 3.14159265359.
	π

Hyperbolic trigonometry

The hyperbolic trigonometry functions can also take complex numbers as arguments.

ACOSH	Inverse hyperbolic cosine : cosh–1x.
	ACOSH(value)
ASINH	Inverse hyperbolic sine : sinh–1x.
	ASINH(value)
ATANH	Inverse hyperbolic tangent : tanh–1x.
	ATANH(value)
COSH	Hyperbolic cosine
	COSH(value)
SINH	Hyperbolic sine.
	SINH(value)
TANH	Hyperbolic tangent.
	TANH(value)

Using mathematical functions 10-9