DragonFly On-Line Manual Pages


TAN(3)		      DragonFly Library Functions Manual		TAN(3)

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 (mea- sured 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.

SEE ALSO

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

STANDARDS

These functions conform to ISO/IEC 9899:1999 (``ISO C99''). DragonFly 4.1 December 21, 2011 DragonFly 4.1