		FLOAT Library User's Documentation
 
TRANSCEN supplies certain transcendental functions. They give
at least 11 significant digits in all known cases.
  
 
FUNCTIONS
 
sqrt(x);		square root 
exp(x);			exponential 
log(x);			natural logarithm 
log10(x);		log base 10 
pow(x,y);		pow(x,y) = x**y
 
atan(x);		arc tangent 
				(value in range -pi/2 to pi/2) 
atan2(x,y);		arc tangent of x/y 
				(value in range -pi to pi) 
cos(x);			cosine 
sin(x);			sine 
tan(x);			tangent 
 
cosh(x);		hyperbolic cosine
sinh(x);		hyperbolic sine
tanh(x);		hyperbolic tangent
 
In each case, the arguments and the value returned are doubles.
 
 
INTERNAL DOCUMENTATION
 
The square root is calculated by the Newton-Raphson method. The
hyperbolic functions are calculated in terms of the exponential.
The other functions are calculated by means of power series
after range reduction.
 
 
POTENTIAL IMPROVEMENTS 
 
Inverse hyperbolics, gamma, and zeta (among others) could be added.
The hyperbolic functions sinh() and tanh() would be more accurate near zero if they
were defined by their own power series.
 
 
AUTHOR
 
sqrt, atan2, cosh, sinh, and tanh (the easy ones) were written
by J. R. Van Zandt, and the others by Neil Colvin. 
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