/*	sinh(arg) returns the hyperbolic sine of its floating-	point argument.	The exponential function is called for arguments	greater in magnitude than 0.5.	A series is used for arguments smaller in magnitude than 0.5.	The coefficients are #2029 from Hart & Cheney. (20.36D)	cosh(arg) is computed from the exponential function for	all arguments.*/double	exp();static double p0  = -0.6307673640497716991184787251e+6;static double p1  = -0.8991272022039509355398013511e+5;static double p2  = -0.2894211355989563807284660366e+4;static double p3  = -0.2630563213397497062819489e+2;static double q0  = -0.6307673640497716991212077277e+6;static double q1   = 0.1521517378790019070696485176e+5;static double q2  = -0.173678953558233699533450911e+3;doublesinh(arg)double arg;{	double temp, argsq;	register sign;	sign = 1;	if(arg < 0) {		arg = - arg;		sign = -1;	}	if(arg > 21.) {		temp = exp(arg)/2;		if (sign>0)			return(temp);		else			return(-temp);	}	if(arg > 0.5) {		return(sign*(exp(arg) - exp(-arg))/2);	}	argsq = arg*arg;	temp = (((p3*argsq+p2)*argsq+p1)*argsq+p0)*arg;	temp /= (((argsq+q2)*argsq+q1)*argsq+q0);	return(sign*temp);}doublecosh(arg)double arg;{	if(arg < 0)		arg = - arg;	if(arg > 21.) {		return(exp(arg)/2);	}	return((exp(arg) + exp(-arg))/2);}