Trigonometric Approximations


Summary

These functions provide fast access to approximations of the desired
trigonometric values.  Angles are in degrees.


Defines

 PI		= 3.1415926535897
 SMALLNUM	= 1.0e-6


Functions

 void	TrigApproxInit()

		TrigApproxInit() must be called prior to using the other
		functionsor macros.  It 

 double	Sin(double angle)

		Return sine approximations.

 double	Cos(double angle)

		Return cosine approximations.

 double	Tan(double angle)

		Return tangent approximations.


Macros

 Csc(angle)	= ( 1.0/Sin(angle) )

		Return cosecant approximations.

 Sec(angle)	= ( 1.0/Cos(angle) )

		Return secant approximations.

 Cot(angle)	= ( 1.0/Tan(angle) )

		Return cotangent approximations.