reading of 42 pages

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  • April 30, 2021 at 11:09 pm #3913 Score: 0
    NoetherTheorem
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    I got this far in the ‘short-short’ pdf :
    Page 1-10 Section “In practice, however, so-called direction cosines are used: (…)” I can not get this math. I don’t know what is really going on.

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