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Manual Pages — TAN

NAME

tan, tanf, tanl – tangent functions

CONTENTS

LIBRARY
SYNOPSIS
DESCRIPTION
RETURN VALUES
SEE ALSO
STANDARDS

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.

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").

January 24, 2008

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