VF_sin2VD_sin2VE_sin2
VFx_sin2VDx_sin2VEx_sin2
VFr_sin2VDr_sin2VEr_sin2
VFrx_sin2VDrx_sin2VErx_sin2
FunctionSquare of the sine function
Syntax C/C++#include <VFmath.h>
int VF_sin2( fVector Y, fVector X, ui size );
int VFx_sin2( fVector Y, fVector X, ui size, float A, float B, float C );
C++ VecObj#include <OptiVec.h>
int vector<T>::sin2( const vector<T>& X );
int vector<T>::x_sin2( const vector<T>& X, const T& A, const T& B, const T& C );
Pascal/Delphiuses VFmath;
function VF_sin2( Y, X:fVector; size:UIntSize ): IntBool;
function VFx_sin2( Y, X:fVector; size:UIntSize; A, B, C:Single ): IntBool;
Descriptionnormal versions: Yi = sin2( Xi )
expanded versions: Yi = C * sin2( A*Xi+B )
Calculating the squared trigonometric functions directly is faster and sometimes more accurate than first calculating the trigonometric function itself and squaring it afterwards. The reduced-range versions with the prefixes VFr_ and VFrx_ are for situations in which one can be sure that all input values lie in the range -2p <= Xi <= +2p.
Error handlingPrecision errors lead to a default result of 0.0 and 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 valueFALSE (0), if no error occurred, otherwise TRUE (non-zero).
See alsoVF_sin,   VF_sinrpi,  sin

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