dont understand how A ⋅ B ≤ |A ⋅ B|, when the dotproduct can't be less than zero, so the absolute signs shouldnt have an impact on the outcome right? For context this is from the proof of the triangle inequa

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter10: Inequalities
Section10.7: Graphing Linear Inequalities
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I dont understand how A ⋅ B ≤ |A ⋅ B|, when the dotproduct can't be less than zero, so the absolute signs shouldnt have an impact on the outcome right? For context this is from the proof of the triangle inequality.

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