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Math Help - partial derivatives

  1. #1
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    partial derivatives

    If a, b ,c are the sides of a triangle and A B C are the opposite angles, find dA/da , dA/db, dA/dc by implicit differentiation of the law of cosines.

    i really dont know how to di this, can anyone plz help me thank u
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  2. #2
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    i think it may help



    total derivative in wiki
    Total derivative - Wikipedia, the free encyclopedia

    i didn't study maths for a long time and i really dun know how to prove it(total derivative) , can anyone tell me?
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  3. #3
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    ohh well actually in my question the dA/db, dA/dc ( the ds are supppose the del letter (or im not sure how it is called.)

    If a, b ,c are the sides of a triangle and A B C are the opposite angles, find dA/da , dA/db, dA/dc by implicit differentiation of the law of cosines.

    i really dont know how to di this, can anyone plz help me thank u
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