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Diffstat (limited to 'man3/cacos.3')
| -rw-r--r-- | man3/cacos.3 | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/man3/cacos.3 b/man3/cacos.3 new file mode 100644 index 000000000..13e3aacbf --- /dev/null +++ b/man3/cacos.3 @@ -0,0 +1,28 @@ +.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de) +.\" Distributed under GPL +.\" +.TH CACOS 3 2002-07-28 "" "complex math routines" +.SH NAME +cacos, cacosf, cacosl \- complex arc cosine +.SH SYNOPSIS +.B #include <complex.h> +.sp +.BI "double complex cacos(double complex " z ); +.sp +.BI "float complex cacosf(float complex " z ); +.sp +.BI "long double complex cacosl(long double complex " z ); +.sp +Link with \-lm. +.SH DESCRIPTION +The cacos() function calculates the complex acos(). +If y = cacos(z), then z = ccos(y). +The real part of y is chosen in the interval [0,pi]. +.LP +One has cacos(z) = -i clog(z+csqrt(z*z-1)). +.SH "CONFORMING TO" +C99 +.SH "SEE ALSO" +.BR ccos (3), +.BR clog (3), +.BR complex (5) |