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    janea29's Avatar
    janea29 Posts: 1, Reputation: 1
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    #1

    Dec 13, 2011, 06:24 PM
    proving trig identities
    2tanx/1-tan^2x 1/2cos^2x-1
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Dec 14, 2011, 04:29 AM
    Convert all the ratios to sine and cosine ratios and try to simplify the fractions.
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