DragonFly On-Line Manual Pages

CASIN(3)              DragonFly Library Functions Manual              CASIN(3)

NAME
     casin, casinf, casinl -- complex circular arc sine

SYNOPSIS
     #include <complex.h>

     double complex
     casin(double complex z);

     float complex
     casinf(float complex z);

     long double complex
     casinl(long double complex z);

DESCRIPTION
     The casin(), casinf() and casinl() functions compute the complex circular
     arc sine of z.

     For all complex floating-point numbers z,

           casin(z) = -i clog(iz + csqrt(1 - z^2)).

RETURN VALUES
     The casin(), casinf() and casinl() functions return the complex circular
     arc sine of z with unbounded imaginary part, and real part in the
     interval [-Pi/2, Pi/2].

SEE ALSO
     cacos(3), catan(3)

STANDARDS
     The casin(), casinf() and casinl() functions conform to ISO/IEC 9899:1999
     (``ISO C99'').

DragonFly 4.1                    June 5, 2013                    DragonFly 4.1