Mathematical Library Functions                          catan(3M)



NAME
     catan, catanf, catanl - complex arc tangent functions

SYNOPSIS
     c99 [ flag... ] file... -lm [ library... ]
     #include 

     double complex catan(double complex z);


     float complex catanf(float complex z);


     long double complex catanl(long double complex z);


DESCRIPTION
     These functions compute the complex arc tangent of  z,  with
     branch  cuts  outside  the interval [ -i, ]pipii ] along
     the imaginary axis.

RETURN VALUES
     These functions return the complex arc tangent value, in the
     range  of  a  strip  mathematically unbounded along the ima-
     ginary axis and in the interval [ -pi/2, ]pi/2 ]  along  the
     real axis.

ERORS
     No errors are defined.

ATRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     Interface Stability          Standard                    
    
     MT-Level                     MT-Safe                     
    


SEE ALSO
     complex.h(3HEAD), ctan(3M), attributes(5), standards(5)








SunOS 5.11          Last change: 12 Jul 2006                    1