Q : if Prove that : and
Last edited by mr fantastic; Sep 7th 2011 at 01:53 PM. Reason: Title.
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Originally Posted by mido22 Q : if Prove that : and What have you tried? You could start by using the cosine rule to express cos A and cos B in terms of a, b and c. Then try to simplify the resulting equation. Edit. After checking the question, I think that you have stated it wrongly. It should say Prove that : or .
Last edited by Opalg; Sep 6th 2011 at 11:49 PM.
yes it is or not and i made alot of tries but all reach to same result :
Originally Posted by mido22 yes it is or not and i made alot of tries but all reach to same result : Can you say a=b from this?
no i can't say so becz a!=b
Originally Posted by mido22 yes it is or not and i made alot of tries but all reach to same result : since ...
and how can i get a=b from same problem
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