Mathematical Library Functions                         catanh(3M)



NAME
     catanh, catanhf, catanhl - complex  arc  hyperbolic  tangent
     functions

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

     double complex catanh(double complex z);


     float complex catanhf(float complex z);


     long double complex catanhl(long double complex z);


DESCRIPTION
     These functions compute the complex arc  hyperbolic  tangent
     of z, with branch cuts outside the interval [ -1, ]1 ] along
     the real axis.

RETURN VALUES
     These functions return the complex  arc  hyperbolic  tangent
     value,  in  the  range  of  a strip mathematically unbounded
     along the real axis and in the interval [ -ipi/2,  ]ipi/2  ]
     along the imaginary 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), ctanh(3M), attributes(5), standards(5)







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