cos(3) [freebsd man page]

COS(3)							   BSD Library Functions Manual 						    COS(3)

NAME

     cos, cosf, cosl -- cosine functions

LIBRARY

     Math Library (libm, -lm)

SYNOPSIS

     #include <math.h>

     double
     cos(double x);

     float
     cosf(float x);

     long double
     cosl(long double x);

DESCRIPTION

     The cos(), cosf(), and cosl() functions compute the cosine of x (measured in radians).  A large magnitude argument may yield a result with
     little or no significance.  For a discussion of error due to roundoff, see math(3).

RETURN VALUES

     The cos(), cosf(), and cosl() functions return the cosine value.

SEE ALSO

     acos(3), asin(3), atan(3), atan2(3), ccos(3), cosh(3), math(3), sin(3), sinh(3), tan(3), tanh(3)

STANDARDS

     These functions conform to ISO/IEC 9899:1999 (``ISO C99'').

BSD
								 January 24, 2008							       BSD

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