Mathematical Library Functions                            cos(3M)



NAME
     cos, cosf, cosl - cosine function

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

     double cos(double x);


     float cosf(float x);


     long double cosl(long double x);


DESCRIPTION
     These functions compute the cosine of x, measured  in  radi-
     ans.

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


     If x is NaN, NaN is returned.


     If x is ]0, 1.0 is returned.


     If x is ]Inf, a domain error occurs and a NaN is returned.

ERORS
     These functions will fail if:

     Domain Error    The x argument is ]Inf.

                     If the integer expression  (matherrhandling
                     &  MATHEREXCEPT)  is non-zero, the invalid
                     floating-point exception is raised.


USAGE
     An application wanting to check for exceptions  should  call
     feclearexcept(FEALEXCEPT) before calling these functions.
     On  return,  if  fetestexcept(FEINVALID    FEDIVBYZERO  
     FEOVERFLOW    FEUNDERFLOW)  is non-zero, an exception has
     been raised. An application should either examine the return
     value  or check the floating point exception flags to detect
     exceptions.




SunOS 5.11          Last change: 12 Jul 2006                    1






Mathematical Library Functions                            cos(3M)



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



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


SEE ALSO
     acos(3M),  feclearexcept(3M),  fetestexcept(3M),  isnan(3M),
     math.h(3HEAD), sin(3M), tan(3M), attributes(5), standards(5)





































SunOS 5.11          Last change: 12 Jul 2006                    2