OptiVec: VF

VF_cos

VD_cos

VE_cos

VFx_cos

VDx_cos

VEx_cos

VFr_cos

VDr_cos

VEr_cos

VFrx_cos

VDrx_cos

VErx_cos

VCF_cos

VCD_cos

VCE_cos

VCFx_cos

VCDx_cos

VCEx_cos

Function

Cosine function

Syntax C/C++	#include <VFmath.h> int VF_cos( fVector Y, fVector X, ui size ); int VFx_cos( fVector Y, fVector X, ui size, float A, float B, float C ); int VFr_cos( fVector Y, fVector X, ui size ); int VFrx_cos( fVector Y, fVector X, ui size, float A, float B, float C );
C++ VecObj	#include <OptiVec.h> int vector<T>::cos( const vector<T>& X ); int vector<T>::x_cos( const vector<T>& X, const T& A, const T& B, const T& C ); int vector<T>::r_cos( const vector<T>& X ); int vector<T>::rx_cos( const vector<T>& X, const T& A, const T& B, const T& C );
Pascal/Delphi	uses VFmath; function VF_cos( Y, X:fVector; size:UInt ): IntBool; function VFx_cos( Y, X:fVector; size:UInt; A, B, C:Single ): IntBool; function VFr_cos( Y, X:fVector; size:UInt ): IntBool; function VFrx_cos( Y, X:fVector; size:UInt; A, B, C:Single ): IntBool;

Description

normal versions: Y_i = cos ( X_i )
expanded versions: Y_i = C * cos ( A*X_i + B )
For large values of X_i, round-off error becomes appreciable; if the X_i values are representable as rational multiples of p, it is better to use VF_cosrpi than VF_cos.
If, on the other hand, one can be sure that all X_i are within the range -2p <= X_i <= +2p, one can employ the faster reduced-range versions with the prefixes VFr_ and VFrx_.

Error handling

Precision errors in the real-value functions lead to a default result of 1.0 (as if the input were 0.0) and to a non-zero return value, but are otherwise ignored; _matherr is not called.
OVERFLOW errors can only occur in the complex versions and lead to a result of ±HUGE_VAL.

Return value

FALSE (0), if no error occurred, otherwise TRUE (non-zero).