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CACOS(3)	       FreeBSD Library Functions Manual		      CACOS(3)

NAME
     cacos, cacosf, cacosl, cacosh, cacoshf, cacoshl, casin, casinf, casinl,
     casinh, casinhf, casinhl, catan, catanf, catanl, catanh, catanhf, catanhl
     --	complex	inverse	trigonometric and hyperbolic functions

LIBRARY
     Math Library (libm, -lm)

SYNOPSIS
     #include <complex.h>

     double complex
     cacos(double complex z);

     float complex
     cacosf(float complex z);

     long double complex
     cacosl(long double	complex	z);

     double complex
     cacosh(double complex z);

     float complex
     cacoshf(float complex z);

     long double complex
     cacoshl(long double complex z);

     double complex
     casin(double complex z);

     float complex
     casinf(float complex z);

     long double complex
     casinl(long double	complex	z);

     double complex
     casinh(double complex z);

     float complex
     casinhf(float complex z);

     long double complex
     casinhl(long double complex z);

     double complex
     catan(double complex z);

     float complex
     catanf(float complex z);

     long double complex
     catanl(long double	complex	z);

     double complex
     catanh(double complex z);

     float complex
     catanhf(float complex z);

     long double complex
     catanhl(long double complex z);

DESCRIPTION
     The cacos(), casin(), and catan() functions compute the principal value
     of	the inverse cosine, sine, and tangent of the complex number z, respec-
     tively.  The cacosh(), casinh(), and catanh() functions compute the prin-
     cipal value of the	inverse	hyperbolic cosine, sine, and tangent.  The
     cacosf(), casinf(), catanf() cacoshf(), casinhf(),	and catanhf() func-
     tions perform the same operations in float	precision.  The	cacosl(),
     casinl(), catanl()	cacoshl(), casinhl(), and catanhl() functions perform
     the same operations in long double	precision.

     There is no universal convention for defining the principal values	of
     these functions.  The following table gives the branch cuts, and the cor-
     responding	ranges for the return values, adopted by the C language.

     Function	 Branch	Cut(s)				      Range
     cacos	 (-infinity, -1) <union> (1, infinity)	      [0, pi]
     casin	 (-infinity, -1) <union> (1, infinity)	      [-pi/2, pi/2]
     catan	 (-infinity*I, -I) <union> (I, infinity*I)    [-pi/2, pi/2]
     cacosh	 (-infinity, 1)				      [-pi*I, pi*I]
     casinh	 (-infinity*I, -I) <union> (I, infinity*I)    [-pi/2*I,
										   pi/2*I]
     catanh	 (-infinity, -1) <union> (1, infinity)	      [-pi/2*I,
										   pi/2*I]

SEE ALSO
     ccos(3), ccosh(3),	complex(3), cos(3), math(3), sin(3), tan(3)

STANDARDS
     These functions conform to	ISO/IEC	9899:1999 ("ISO	C99").

FreeBSD	13.0		       February	15, 2017		  FreeBSD 13.0
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | SEE ALSO | STANDARDS

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