2004-11-03 13:51:07 +00:00
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.\" Copyright 2002 Walter Harms(walter.harms@informatik.uni-oldenburg.de)
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.\" Distributed under GPL
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.\"
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.TH CACOSH 3 2002-07-28 "" "complex math routines"
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.SH NAME
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cacosh, cacoshf, cacoshl \- complex arc hyperbolic cosine
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.SH SYNOPSIS
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.B #include <complex.h>
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.sp
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.BI "double complex cacosh(double complex " z );
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2004-11-11 17:28:42 +00:00
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.br
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2004-11-03 13:51:07 +00:00
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.BI "float complex cacoshf(float complex " z );
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2004-11-11 17:28:42 +00:00
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.br
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2004-11-03 13:51:07 +00:00
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.BI "long double complex cacoshl(long double complex " z );
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.sp
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Link with \-lm.
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.SH DESCRIPTION
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2005-10-19 14:48:35 +00:00
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The
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.BR cacosh ()
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function calculates the complex acosh().
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2004-11-03 13:51:07 +00:00
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If y = cacosh(z), then z = ccosh(y).
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2005-07-07 08:27:03 +00:00
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The imaginary part of y is chosen in the interval [\-pi,pi].
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2004-11-03 13:51:07 +00:00
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The real part of y is chosen nonnegative.
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.LP
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2005-07-07 08:27:03 +00:00
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One has cacosh(z) = (0.5)*clog((1+z)/(1\-z)).
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2004-11-03 13:51:07 +00:00
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.SH "CONFORMING TO"
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C99
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.SH "SEE ALSO"
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.BR acosh (3),
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.BR cabs (3),
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.BR cimag (3),
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2006-04-21 01:24:06 +00:00
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.BR complex (7)
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