NAME

tan, tanf, tanl —

tangent functions

LIBRARY

Math Library (libm, -lm)

SYNOPSIS

#include <math.h>

double
tan(double x);

float
tanf(float x);

long double
tanl(long double x);

DESCRIPTION

The tan(), tanf(), and tanl() 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(), tanf(), and tanl() functions return the tangent value.

STANDARDS

These functions conform to ISO/IEC 9899:1999 (“ISO C99”).