RXXMATH - Arbitrary Precision Math Functions for REXX

Description from the author:

"RXXMATH is an extremely easy-to-use math package which may be called as an external routine from REXX or invoked from the command line. RXXMATH is true to the spirit of REXX math in that it will calculate results to arbitrary precision. Because RXXMATH is itself written entirely in REXX it should port essentially unchanged to any environment which supports REXX. (RXXMATH was originally written for VM/CMS, but the author has also run it under MVS/TSO, IBM PC DOS 7, and OS/2). Note that along with the basic math functions RXXMATH has an interpretative calculator function which may be used to evaluate complex mathematical expressions, or even used as a interactive 'REXX shell'."

The following functions are supported:

FACT(x)

Factorial of x
PERM(x,y)
Permutations of x by y
COMB(x,y)
Combinations of x by y
SQRT(x)
Square root of x
POW(x,y)
x to the power of y
LOG(x,y)
Log of y base x
EXP(x)
e to the power of x
LN(x)
Natural log of x
PI()
Value of pi
SIN(x)
Sine of x
COS(x)
Cosine of x
TAN(x)
Tangent of x
COT(x)
Cotangent of x
SEC(x)
Secant of x
CSC(x)
Cosecant of x
ARCSIN(x)
Inverse sine of x
ARCCOS(x)
Inverse cosine of x
ARCTAN(x)
Inverse tangent of x
ARCCOT(x)
Inverse cotangent of x
ARCSEC(x)
Inverse secant of x
ARCCSC(x)
Inverse cosecant of x
CALC(x)
Calculate the value of an expression (e.g. '1 + exp(pi() / 2)')
• see also Regina Rexx Math functions)

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