Content-type: text/html Man page of cos

cos

Section: Mathematical Library Functions (3M)
Updated: 12 Jul 2006
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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 feclearexcept(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 TYPEATTRIBUTE VALUE
Interface StabilityStandard
MT-LevelMT-Safe

 

SEE ALSO

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


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUES
ERRORS
USAGE
ATTRIBUTES
SEE ALSO

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Time: 02:39:32 GMT, October 02, 2010