# Difference between revisions of "ApCoCoA-1:Fn.ArcTan"

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## Latest revision as of 10:01, 7 October 2020

This article is about a function from ApCoCoA-1. |

## Fn.ArcTan

Returns the arctangent of a given value.

### Syntax

Fn.ArcTan(X:RAT):RAT

### Description

This function returns the arctangent of `X` rounded to the current

global accuracy.

@param

*X*Value of which to compute the arctangent.@return The arctangent of

`X`rounded to the current global accuracy.

#### Example

Fn.SetAccuracy(20); R := Fn.ArcTan(1/2); Dec(R, 30); 0.46364760900080611621 -------------------------------