<tt>
ArcTan: Returns the arctangent of a number
</tt>

<ms>
Function that returns the arctangent of a number, angle expressed in radians.

- ArcTan(X): float

Parameters:
- (float) X: tangent for which to get the angle.

Description:
Use the ArcTan function to derive the arctangent of a number, an angle expressed in radians. This instruction is a trigonometric function, inverse of the tangent function (Tan) and having as values the angles expressed in radians. The resulting angle is expressed in radians with a value between -PiGreek/2 and PiGreek/2.
To express the arc tangent in degrees, multiply the result by 180/PiGreek.
</ms>

<rl>
TBiblosBrailleGeometry.Language.Instructions.Tan
TBiblosBrailleGeometry.Language.Instructions
TBiblosBrailleGeometry.Language
</rl>

<ck>
00H73RBZC0UUOE
</ck>

<in>
103 511
</in>
