cos(3) BSD Library Functions Manual cos(3)
NAME
cos -- cosine function
SYNOPSIS
#include <math.h>
double
cos(double x);
long double
cosl(long double x);
float
cosf(float x);
DESCRIPTION
The cos() function computes the cosine of x (measured in radians).
SPECIAL VALUES
cos(+-0) returns 1.
cos(+-infinity) returns a NaN and raises the "invalid" floating-point
exception.
VECTOR OPERATIONS
If you need to apply the cos() function to SIMD vectors or arrays, using
the following functions provided by the Accelerate.framework may give
significantly better performance:
#include <Accelerate/Accelerate.h>
vFloat vcosf(vFloat x);
vFloat vsincosf(vFloat x, vFloat *c);
void vvcosf(float *y, const float *x, const int *n);
void vvcos(double *y, const double *x, const int *n);
void vvsincosf(float *s, float *c, const float *x, const int *n);
void vvsincos(double *s, double *c, const double *x, const int *n);
SEE ALSO
sin(3), tan(3), asin(3), acos(3), atan(3), atan2(3), sinh(3), cosh(3),
tanh(3), math(3)
STANDARDS
The cos() function conforms to ISO/IEC 9899:2011.
BSD December 11, 2006 BSD
Mac OS X 10.9.1 - Generated Tue Jan 7 08:24:08 CST 2014