Synopsis
#include <math.h>
float tanf(float x);
Description
tanf returns the radian circular tangent of x.
Fast math library special cases
If |x| > 10^9, errno is set to EDOM and tanf returns HUGE_VALF.
IEC 60559 math library special cases
If x is NaN, tanf returns x.
If |x| is ∞, tanf returns NaN with invalid signal.
Portability
tanf conforms to ISO/IEC 9899:1990 (C90) and ISO/IEC 9899:1999 (C99).