| ATAN(3) | Library Functions Manual | ATAN(3) |
atan, atanf,
atanl — arc tangent
functions of one variable
#include
<math.h>
double
atan(double
x);
float
atanf(float
x);
long double
atanl(long
double x);
The atan() function computes the principal
value of the arc tangent of x in the range
[-pi/2, +pi/2]. The atanf() function is a
single precision version of atan(). The
atanl() function is an extended precision version of
atan().
acos(3), asin(3), atan2(3), cos(3), cosh(3), sin(3), sinh(3), tan(3), tanh(3)
| April 26, 2016 | OpenBSD-current |