GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
Debian 6.0.2(Squeeze) |
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catan(3) |
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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);
Link with −lm.
The catan() function calculates the complex arc tangent of z. 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))
These functions first appeared in glibc in version 2.1.
C99.
ccos(3), clog(3), complex(7)
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.
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catan(3) | |