# ApCoCoA-1:Fn.Sin

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## Fn.Sin

Returns the sine of a given value.

### Syntax

Fn.Sin(X:RAT):RAT

### Description

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

global accuracy.

@param

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

`X`rounded to the current global accuracy.

#### Example

Fn.SetAccuracy(20); R := Fn.Sin(1); Dec(R, 30); 0.84147098480789650665 -------------------------------