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AutoCAD 2025 for Mac Developer and ObjectARX
    • Customization Guide
    • DXF Reference
    • AutoLISP and DCL
      • AutoLISP: Developer's Guide
      • AutoLISP: Reference
        • Functions Reference (AutoLISP)
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    cos (AutoLISP)

    Returns the cosine of an angle expressed in radians

    Supported Platforms: Windows, Mac OS, and Web

    Signature

    (cos ang)
    ang

    Type: Integer or Real

    An angle, in radians.

    Return Values

    Type: Real

    The cosine of ang, in radians.

    Examples

    (cos 0.0)
    1.0
    
    (cos pi)
    -1.0

    Related Concepts

    • Arithmetic Functions Reference (AutoLISP)

    Related Reference

    • atan (AutoLISP)
    • sin (AutoLISP)

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