Manual of TAN(3) (v2.19)

NAME

tan, tanf, tanl - tangent function

SYNOPSIS

#include <math.h>

double tan(double x);

float tanf(float x);

long double tanl(long double x);

Link with -lm.

DESCRIPTION

The tan() function returns the tangent of x, where x is given in radians.

CONFORMING TO

SVID 3, POSIX, 4.3BSD, ISO 9899. The float and the long double variants are C99 requirements.

SEE ALSO

acos(3), asin(3), atan(3), atan2(3), cos(3), ctan(3), sin(3)