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    reichenbach's Avatar
    reichenbach Posts: 2, Reputation: 1
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    #1

    Jun 24, 2012, 08:29 PM
    verify identity tan^2(x)/(sec(x)-1)=(1+cos(x))/cos(x)
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    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Jun 24, 2012, 09:45 PM
    Try converting all in terms of because and sin.
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