DragonFly On-Line Manual Pages

CACOS(3)              DragonFly Library Functions Manual              CACOS(3)

NAME
     cacos, cacosf, cacosl -- complex circular arc cosine

SYNOPSIS
     #include <complex.h>

     double complex
     cacos(double complex z);

     float complex
     cacosf(float complex z);

     long double complex
     cacosl(long double complex z);

DESCRIPTION
     The cacos(), cacosf() and cacosl() functions compute the complex circular
     arc cosine of z.

     For all complex floating-point numbers z,

           cacos(z) = Pi/2 - casin(z).

RETURN VALUES
     The cacos(), cacosf() and cacosl() functions return the complex circular
     arc cosine of z with unbounded imaginary part, and real part in the
     interval [0, Pi].

SEE ALSO
     casin(3), catan(3)

STANDARDS
     The cacos(), cacosf() and cacosl() functions conform to ISO/IEC 9899:1999
     (``ISO C99'').

DragonFly 4.1                    June 5, 2013                    DragonFly 4.1