Texas Instruments TI-89 Developer's Guide

368
Appendix A: System Routines — Direct Floating Point Operations
TI
-
89 / TI
-
92 Plus Developer Guide
Not for Distribution
Beta Version January 26, 2001
acosh
Declaration:
double
acosh
(double
x
)
Category(ies):
Direct Floating Point Operations
Description:
Computes the inverse hyperbolic cosine of
x
.
Inputs:
x
— A double floating-point value.
Outputs:
For
x
>= 1 returns inverse hyperbolic cosine of
x.
For
x
< 1 returns a floating-point NAN.
Assumptions:
None
Side Effects:
None
Availability:
All versions of the TI
-
89 / TI
-
92 Plus.
TI
-
89 / TI
-
92 Plus
Differences:
None
See Also: asinh, atanh, cosh, sinh, tanh
Example:

Texas Instruments TI-89 Specifications

General

Display size (HxV)	100 x 160 mm
Memory type	639K FLASH ROM, 188K bytes RAM
Compatible operating systems	Operating System 2.09
Battery type	AAA