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NAME

       math - Mathematical Functions

DESCRIPTION

       This module provides an interface to a number of mathematical functions.

   Note:
       Not  all  functions  are implemented on all platforms. In particular, the erf/1 and erfc/1
       functions are not implemented on Windows.

EXPORTS

       pi() -> float()

              A useful number.

       sin(X) -> float()

       cos(X) -> float()

       tan(X) -> float()

       asin(X) -> float()

       acos(X) -> float()

       atan(X) -> float()

       atan2(Y, X) -> float()

       sinh(X) -> float()

       cosh(X) -> float()

       tanh(X) -> float()

       asinh(X) -> float()

       acosh(X) -> float()

       atanh(X) -> float()

       exp(X) -> float()

       log(X) -> float()

       log10(X) -> float()

       pow(X, Y) -> float()

       sqrt(X) -> float()

              Types:

                 Y = X = number()

              A collection of math functions which return floats. Arguments are numbers.

       erf(X) -> float()

              Types:

                 X = number()

              Returns the error function of X, where

              erf(X) = 2/sqrt(pi)*integral from 0 to X of exp(-t*t) dt.

       erfc(X) -> float()

              Types:

                 X = number()

              erfc(X) returns 1.0 - erf(X), computed by methods that avoid cancellation for large
              X.

BUGS

       As these are the C library, the bugs are the same.