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cos(3M)			Mathematical Library Functions		       cos(3M)

NAME
       cos, cosf, cosl - cosine function

SYNOPSIS
       c99 [ flag... ] file... -lm [ library... ]
       #include <math.h>

       double cos(double x);

       float cosf(float x);

       long double cosl(long double x);

DESCRIPTION
       These functions compute the cosine of x, measured in radians.

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.

ERRORS
       These functions will fail if:

       Domain Error    The x argument is ±Inf.

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

USAGE
       An  application	wanting to check for exceptions should call feclearex‐
       cept(FE_ALL_EXCEPT) before  calling  these  functions.  On  return,  if
       fetestexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW) 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.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       ┌─────────────────────────────┬─────────────────────────────┐
       │      ATTRIBUTE TYPE	     │	    ATTRIBUTE VALUE	   │
       ├─────────────────────────────┼─────────────────────────────┤
       │Interface Stability	     │Committed			   │
       ├─────────────────────────────┼─────────────────────────────┤
       │MT-Level		     │MT-Safe			   │
       ├─────────────────────────────┼─────────────────────────────┤
       │Standard		     │See standards(5).		   │
       └─────────────────────────────┴─────────────────────────────┘

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

SunOS 5.11			  12 Jul 2006			       cos(3M)
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