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    Kendra22's Avatar
    Kendra22 Posts: 11, Reputation: 1
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    #1

    May 16, 2009, 06:49 PM
    Trigonometry Expressions
    Find the exact value of (tan pi/10 + tan pi/15) / (1- tan pi/10 tan pi/15)
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    May 17, 2009, 12:03 AM

    Hey, I see you don't know your basic identities!

    I'll do that last one for you:



    iiOOOOOOOOO


    iiOOOOOOOOO or
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