GNU/Linux |
CentOS 4.8 |
i386 |
catan(3) |
catan, catanf, catanl − complex arc tangents
#include <complex.h>
double complex catan(double complex z);
float complex catanf(float complex z);
long double complex catanl(long double complex z);
The catan() function calculates the complex atan(). If y = catan(z), then z = ctan(y). The real part of y is chosen in the interval [-pi/2,pi/2].
One has catan(z) = 1/2i clog((1+iz)/(1-iz)).
C99
clog(3), ccos(3)
catan(3) |