ArcCos
Returns the inverse cosine, in radians.
Module: Math
Signature
rux
func ArcCos(x: float64) -> float64;
func ArcCos(x: float32) -> float32;Parameters
| Name | Type | Description |
|---|---|---|
x | float64 / float32 | A value in [-1, 1]. |
Returns
The angle in [0, Pi] whose cosine is x. ArcCos(1.0) is 0.0 and ArcCos(-1.0) is Pi. For |x| > 1.0 the result is a NaN, since no real angle has that cosine; a NaN argument also propagates.
Example
rux
import Math::ArcCos;
let a = ArcCos(1.0); // 0.0
let b = ArcCos(-1.0); // 3.141592653589793 (Pi)