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CACOS(3)		    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,  re-
       spectively.  The	cacosh(), casinh(), and	catanh() functions compute the
       principal  value	 of  the inverse hyperbolic cosine, sine, and tangent.
       The cacosf(), casinf(), catanf()	cacoshf(),  casinhf(),	and  catanhf()
       functions   perform  the	 same  operations  in  float  precision.   The
       cacosl(), casinl(), catanl() cacoshl(), casinhl(), and catanhl()	 func-
       tions 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
       corresponding 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	14.3		       February	15, 2017		      CACOS(3)

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<https://man.freebsd.org/cgi/man.cgi?query=catanl&sektion=3&manpath=FreeBSD+14.3-RELEASE+and+Ports>

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