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    ximena15's Avatar
    ximena15 Posts: 2, Reputation: 1
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    #1

    Jan 24, 2011, 08:25 PM
    (tan x + cot x)^2 = sec^4 x * cot^2 x?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Jan 24, 2011, 11:44 PM

    How about showing what you tried?
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