coth.c File Reference

Hyperbolic cotangent function. More...

#include "prim.h"

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Functions
double	coth (double x)
	Hyperbolic cotangent function. More...

Detailed Description

Hyperbolic cotangent function.

Definition in file coth.c.

Function Documentation

coth()

double coth

(

double

x

)

Hyperbolic cotangent function.

coth(x) = cosh(x)/sinh(x)

Definition at line 44 of file coth.c.

References cosh(), and sinh().

Referenced by RealNumber::HypCotangent().

{
    double a, b, c;

    a = cosh(x);
    b = sinh(x);

    if (TRIG_INEXACT(b))
    {
        return NAN;
    }

    c = a / b;
    return c;
}

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