atan(3M)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ATTRIBUTES | SEE ALSO | STANDARDS

NAME

atan- arc tangent function of one variable

SYNOPSIS

#include <math.h>

double atan(double x);

DESCRIPTION

The atan function computes the principal value of the arc tangent of x. For a discussion of errors due to rounding off, see math(3M).

RETURN VALUES

The atan function returns the arc tangent in radians.

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Interface Stability	Evolving

SEE ALSO

acos(3M), asin(3M), atan2(3M), cos(3M), cosh(3M), sin(3M), sinh(3M), tan(3M), tanh(3M), math(3M)

STANDARDS

The atan function conforms to ANSI-C.

ChorusOS 4.0  Last Revised December 1999

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ATTRIBUTES | SEE ALSO | STANDARDS