XMScalarSinCosEst function (directxmath.h)

Article
02/22/2024

Estimates both the sine and cosine of a radian angle.

Syntax

void XMScalarSinCosEst(
  [out] float *pSin,
  [out] float *pCos,
  [in]  float Value
) noexcept;

Parameters

[out] pSin

Address of a float that will contain the result of the sine of Value.

[out] pCos

Address of a float that will contain the result of the cosine of Value.

[in] Value

float value describing the radian angle.

Return value

None

Remarks

Est functions offer increased performance at the expense of reduced accuracy. Est functions are appropriate for non-critical calculations where accuracy can be sacrificed for speed. The exact amount of lost accuracy and speed increase are platform dependent.

This function uses a 7-degree minimax approximation for sine; 6-degree for cosine.

Platform Requirements

Microsoft Visual Studio 2010 or Microsoft Visual Studio 2012 with the Windows SDK for Windows 8. Supported for Win32 desktop apps, Windows Store apps, and Windows Phone 8 apps.

Requirements

Requirement	Value
Target Platform	Windows
Header	directxmath.h