XMScalarCosEst

Estimates the cosine of a radian angle.

Syntax

float XMScalarCosEst(
         float Value
)  

Parameters

Value
Type: float 

float value describing the radian angle.

Return value

Type: float 

Returns the cosine of Value.

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 6-degree minimax approximation.

Requirements

Header: Declared in directxmath.h.