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 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 TYPE | ATTRIBUTE 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 12 Jul 2006 cos(3M)
