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”).