1 .\" $OpenBSD: casin.3,v 1.2 2013/06/05 03:40:26 tedu Exp $
3 .\" Copyright (c) 2011 Martynas Venckus <martynas@openbsd.org>
5 .\" Permission to use, copy, modify, and distribute this software for any
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17 .Dd $Mdocdate: June 5 2013 $
24 .Nd complex circular arc sine
28 .Fn casin "double complex z"
30 .Fn casinf "float complex z"
31 .Ft long double complex
32 .Fn casinl "long double complex z"
39 functions compute the complex circular arc sine of
42 For all complex floating-point numbers
44 .Bd -literal -offset indent
45 casin(z) = -i clog(iz + csqrt(1 - z^2)).
53 functions return the complex circular arc sine of
55 with unbounded imaginary part, and real part in the interval