VF_acos VD_acos VE_acos
 VCF_acos VCD_acos VCE_acos
 VFx_acos VDx_acos VEx_acos
 VCFx_acos VCDx_acos VCEx_acos
 Function arcus cosinus function
 Syntax C/C++ #include int VF_acos( fVector Y, fVector X, ui size ); int VFx_acos( fVector Y, fVector X, ui size, float A, float B, float C ); C++ VecObj #include int vector::acos( const vector& X ); int vector::x_acos( const vector& X, const T& A, const T& B, const T& C ); Pascal/Delphi uses VFmath; function VF_acos( Y, X:fVector; size:UIntSize ): IntBool; function VFx_acos( Y, X:fVector; size:UIntSize; A, B, C:Single ): IntBool;
 CUDA function C/C++ #include int cudaVF_acos( fVector d_Y, fVector d_X, ui size ); int cudaVFx_acos( fVector d_Y, fVector d_X, ui size, float A, float B, float C ); int cusdVFx_acos( fVector d_Y, fVector d_X, ui size, float *d_A, float *d_B, float *d_C ); int VFcu_acos( fVector h_Y, fVector h_X, ui size ); int VFxcu_acos( fVector h_Y, fVector h_X, ui size, float A, float B, float C ); CUDA function Pascal/Delphi uses VFmath; function cudaVF_acos( d_Y, d_X:fVector; size:UIntSize ): IntBool; function cudaVFx_acos( d_Y, d_X:fVector; size:UIntSize; A, B, C:Single ): IntBool; function cusdVFx_acos( d_Y, d_X:fVector; size:UIntSize; d_A, d_B, d_C:PSingle ): IntBool; function VFcu_acos( h_Y, h_X:fVector; size:UIntSize ): IntBool; function VFxcu_acos( h_Y, h_X:fVector; size:UIntSize; A, B, C:Single ): IntBool;
 Description normal versions: Yi = arccos ( Xi ) expanded versions: Yi = C * arccos (A*Xi + B )
 Error handling Real versions: DOMAIN errors occur for arguments outside the range -1 <= Xi <= +1; the default result is NAN ("not-a-number"). The complex versions should be error-proof as long as the parameter C in the expanded versions is not already near the OVERFLOW limit; this very rare error is neither detected nor handled.
 Return value FALSE (0), if no error occurred, otherwise TRUE (non-zero).