mirror of https://github.com/mkerrisk/man-pages
35 lines
800 B
Groff
35 lines
800 B
Groff
.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
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.\" %%%LICENSE_START(GPL_NOVERSION_ONELINE)
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.\" Distributed under GPL
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.\" %%%LICENSE_END
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.\"
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.TH CCOS 3 2008-08-11 "" "Linux Programmer's Manual"
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.SH NAME
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ccos, ccosf, ccosl \- complex cosine function
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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 ccos(double complex " z ");"
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.br
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.BI "float complex ccosf(float complex " z ");"
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.br
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.BI "long double complex ccosl(long double complex " z ");"
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.sp
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Link with \fI\-lm\fP.
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.SH DESCRIPTION
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The complex cosine function is defined as:
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.nf
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ccos(z) = (exp(i * z) + exp(\-i * z)) / 2
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.fi
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.SH VERSIONS
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These functions first appeared in glibc in version 2.1.
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.SH CONFORMING TO
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C99.
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.SH SEE ALSO
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.BR cabs (3),
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.BR cacos (3),
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.BR csin (3),
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.BR ctan (3),
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.BR complex (7)
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