man math () - Mathematical Functions

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)

cos(X)

tan(X)

asin(X)

acos(X)

atan(X)

atan2(Y, X)

sinh(X)

cosh(X)

tanh(X)

asinh(X)

acosh(X)

atanh(X)

exp(X)

log(X)

log10(X)

pow(X, Y)

sqrt(X)

Types
X = Y = 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.

AUTHOR

Mike Williams - support@erlang.ericsson.se