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Math Help - trig vid` and question

  1. #1
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    trig vid` and question

    Hi all this vid is great to explain the cosine rule, for me a lot easier to grap than explained in my course book.

    after watching this, can anyone explain why(in my course book) the perpendicular is dropped, it seems a pointless exercise.

    Dave
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  2. #2
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    Re: trig vid` and question

    I don't understand what you mean by "dropping the perpendicular"...
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