NAME

tan, tanf — tangent function

LIBRARY

Math Library (libm, -lm)

SYNOPSIS

#include <math.h>

double
tan(double x);

float
tanf(float x);

DESCRIPTION

The tan() and tanf() functions compute the tangent of x (measured in radians). A large magnitude argument may yield a result with little or no significance. For a discussion of error due to roundoff, see math(3).

RETURN VALUES

The tan() function returns the tangent value.

SEE ALSO

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

STANDARDS

The tan() function conforms to ANSI X3.159-1989 (“ANSI C89”).