math (3erl)

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.

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.

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