tanh man page on OSF1

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sinh(3)								       sinh(3)

NAME
       sinh, cosh, tanh - Hyperbolic functions

SYNOPSIS
       #include <math.h>

       double sinh(
	       double x ); float sinhf(
	       float x ); long double sinhl(
	       long double x ); double cosh(
	       double x ); float coshf(
	       float x ); long double coshl(
	       long double x ); double tanh(
	       double x ); float tanhf(
	       float x ); long double tanhl(
	       long double x );

LIBRARY
       Math Library (libm)

STANDARDS
       Interfaces  documented on this reference page conform to industry stan‐
       dards as follows:

       cosh():	XPG4

       sinh():	XPG4

       tanh():	XPG4

       Refer to the standards(5) reference page	 for  more  information	 about
       industry standards and associated tags.

DESCRIPTION
       The  sinh(), sinhf(), and sinhl() functions compute the hyperbolic sine
       of x. Both sinh(x), sinhf(x), and sinhl(x) are  defined	as  (exp(x)  -
       exp(-x))/2.

       The  cosh(),  coshf(),	and  coshl()  functions compute the hyperbolic
       cosine of x.  Both cosh(x), coshf(x), and coshl(x) are defined as (e**x
       + e**(-x))/2.

       The  tanh(), tanhf(), and tanhl() functions compute the hyperbolic tan‐
       gent of x. Both tanh(x), tanhf(x), and tanhl(x) are defined as (e**x  -
       e**(-x))/(e**x + e**(-x)).

       The  following  table describes function behavior in response to excep‐
       tional arguments:

       ────────────────────────────────────────────────────────────────────
       Function			     Exceptional Argument    Routine
							     Behavior
       ────────────────────────────────────────────────────────────────────
       sinh(), sinhf(), sinhl()	     |x|>ln(2 * max_float)   Overflow
       cosh(), coshf(), coshl()	     |x|>ln(2 * max_float)   Overflow
       ────────────────────────────────────────────────────────────────────

       The following table lists boundary values used by these functions:

       ─────────────────────────────────────────────────────────────────
       Value Name      Data Type   Hexadecimal Value   Decimal Value
       ─────────────────────────────────────────────────────────────────
       ln(2	   *   S_FLOAT	   42B2D4FC	       89.41599
       max_float)
		       T_FLOAT	   408633CE8FB9F87E    710.475860073943
       ─────────────────────────────────────────────────────────────────

								       sinh(3)
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