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stewart's theorem.

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  • Sultana Sofia
    hi, this is Maliat. i have a problem with stewart s theorem. this is the proof of stewart s theorem:  ........#2 Multiply the first by x the latter by y :
    Message 1 of 1 , Feb 1, 2009
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      hi, this is Maliat. i have a problem with stewart's theorem. this is the proof of stewart's theorem:
       ........#2

      Multiply the first by x the latter by y :

      Now add the two equations:

       ---this is what the stewart's theorem is.

      but the cosine rule is : a2 = b2+c2 -2bc cos (theta)

      so why is it  (+2px) on #2 ?

       

       


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