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Math Help - Derive Mollweide's Formula for Tangent

  1. #1
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    Smile Derive Mollweide's Formula for Tangent

    Is the law of tangents used at all? Our teacher never introduced it to the class.

    Derive (a - b)/(a + b) = tan[(1/2)(A - B)]/tan[(1/2)(A + B)]

    Also, who is Mollweide? I know that he was a mathematician but our teacher never told the class anything about this guy.

    Thanks
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by magentarita View Post
    Is the law of tangents used at all? Our teacher never introduced it to the class.

    Derive (a - b)/(a + b) = tan[(1/2)(A - B)]/tan[(1/2)(A + B)]
    what is "a" and "b" supposed to be?


    Also, who is Mollweide? I know that he was a mathematician but our teacher never told the class anything about this guy.

    Thanks
    google is your friend, and a lot of the times, wikipedia too
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  3. #3
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    no idea...

    Our teacher placed that question on the board and walked out of the classroom.
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