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Math Help - Challenging proof (involving Arithmetic progressions in triangles)?

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    Super Member fardeen_gen's Avatar
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    Challenging proof (involving Arithmetic progressions in triangles)?

    If the sides of a triangle are in Arithmetic Progression and the greatest angle exceeds the smallest by α, show that the sides are in the ratio 1 - x : 1 : 1 + x , where x = (1 - cos α)(7 - cos α)
    Last edited by fardeen_gen; July 14th 2008 at 06:01 AM.
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  2. #2
    Super Member fardeen_gen's Avatar
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    I have tried to solve the problem(but I doubt if the approach is correct). Please check the attachment.Is my method correct?
    Attached Files Attached Files
    Last edited by fardeen_gen; July 14th 2008 at 06:59 AM.
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  3. #3
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    Quote Originally Posted by fardeen_gen View Post
    I have tried to solve the problem(but I doubt if the approach is correct). Please check the attachment.Is my method correct?
    Yes, nicely worked out
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