Math.ArcCos Function

Calculates the inverse cosine of a given number.

Pascal

function ArcCos(const X: Extended): Extended; overload;
function ArcCos(const X: Double): Double; overload;
function ArcCos(const X: Single): Single; overload;

C++

Extended ArcCos(const Extended X);
Double ArcCos(const Double X);
Single ArcCos(const Single X);

File

Math

Description

ArcCos returns the inverse cosine of X.

X must be between -1 and 1.

The return value is in the range [0..Pi], in radians.