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    kristo's Avatar
    kristo Posts: 41, Reputation: 0
    Junior Member
     
    #1

    Mar 14, 2007, 10:07 AM
    Trigonometry, simplifying
    How do I simplify this?

    free cookies for anyone who helps!
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #2

    Mar 14, 2007, 10:27 AM
    You should have double angle trigonometric identities, which should state that:


    does that help?
    kristo's Avatar
    kristo Posts: 41, Reputation: 0
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    #3

    Mar 14, 2007, 11:25 AM
    Thanks for your help, here's some cookies ;)

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