tanl(3) -- Linux man page
NAME
tan, tanf, tanl - tangent function
SYNOPSIS
#include <math.h>
double tan(double x);
float tanf(float x);
long double tanl(long double x);
DESCRIPTION
The tan() function returns the tangent of x, where x is
given in radians.
CONFORMING TO
SVID 3, POSIX, BSD 4.3, ISO 9899.
The float and the long double variants are C99 requirements.
SEE ALSO
acos(3),
asin(3),
atan(3),
atan2(3),
cos(3),
sin(3)
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