Is there any function for calculating angle between 2 line segments in 3D?

From: Shaozhong SHI <shishaozhong(at)gmail(dot)com>
To: pgsql-sql <pgsql-sql(at)lists(dot)postgresql(dot)org>
Subject: Is there any function for calculating angle between 2 line segments in 3D?
Date: 2022-02-27 10:39:17
Message-ID: CA+i5JwYSg0=TFHsnr+-BnKhU7J=rpgAMKqhLvPMp3kM28bvLzw@mail.gmail.com
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Regards,

David

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