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Diffstat (limited to 'man3/catan.3')
| -rw-r--r-- | man3/catan.3 | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/man3/catan.3 b/man3/catan.3 new file mode 100644 index 000000000..42e12f68b --- /dev/null +++ b/man3/catan.3 @@ -0,0 +1,29 @@ +.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de) +.\" Distributed under GPL +.\" +.TH CATAN 3 2002-07-28 "" "complex math routines" +.SH NAME +catan, catanf, catanl \- complex arc tangents +.SH SYNOPSIS +.B #include <complex.h> +.sp +.BI "double complex catan(double complex " z ); +.sp +.BI "float complex catanf(float complex " z ); +.sp +.BI "long double complex catanl(long double complex " z ); +.sp +Link with \-lm. +.SH DESCRIPTION +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]. +.LP +One has +catan(z) = 1/2i clog((1+iz)/(1-iz)). +.SH "CONFORMING TO" +C99 +.SH "SEE ALSO" +.BR ccos (3), +.BR clog (3), +.BR complex (5) |