asinh.3m

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· 3M 代码 · 共 43 行

.TH asinh 3m RISC
.ds up \fIulp\fR
.ds nn \fINaN\fR
.SH Name
asinh, acosh, atanh \- inverse hyperbolic functions
.SH Syntax
.nf
.B #include <math.h>
.PP
.B double asinh(x)
.B double x;
.PP
.B double acosh(x)
.B double x;
.PP
.B double atanh(x)
.B double x;
.fi
.SH Description
The
.PN asinh ,
.PN acosh ,
and
.PN atanh
functions compute the designated inverse hyperbolic functions for real
arguments.
.SS Errors Because of Roundoff, Etc.
These functions inherit much of their error from 
the 
.MS log1p 3m
function. 
.SH Diagnostics
The 
.PN acosh 
function returns the default quiet \*(nn if the argument is less than one.
.PP
The 
.PN atanh 
function returns the default quiet \*(nn if the argument has an absolute
value greater than or equal to one.
.SH See Also
exp(3m), math(3m)