Mathematical Library Functions                           tanh(3M)



NAME
     tanh, tanhf, tanhl - hyperbolic tangent function

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

     double tanh(double x);


     float tanhf(float x);


     long double tanhl(long double x);


DESCRIPTION
     These functions compute  the  hyperbolic  tangent  of  their
     argument x.

RETURN VALUES
     Upon  successful  completion,  these  functions  return  the
     hyperbolic tangent of x.


     If x is NaN, a NaN is returned.


     If x is ]0, x is returned.


     If x is ]Inf, ]1 is returned.

ERORS
     No errors are defined.

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
















SunOS 5.11          Last change: 12 Jul 2006                    1






Mathematical Library Functions                           tanh(3M)



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


SEE ALSO
     atanh(3M), isnan(3M), math.h(3HEAD), tan(3M), attributes(5),
     standards(5)











































SunOS 5.11          Last change: 12 Jul 2006                    2