| ATAN(3) | Library Functions Manual | ATAN(3) |
atan, atanf,
atanl —
#include <math.h>
double
atan(double
x);
float
atanf(float
x);
long double
atanl(long
double x);
atan(), atanf(), and
atanl() functions compute the principal value of the
arc tangent of x in the range [-pi/2, +pi/2].
atan() functions conforms to
ISO/IEC 9899:1999 (“ISO C99”).
| January 29, 2013 | NetBSD 9.1 |