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

    Jan 24, 2011, 07:45 PM
    (tan x cot x) 2 = sec 4 x cot 2?
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Jan 25, 2011, 07:48 AM

    This is very straightforward, but I believe the "cot^2" bit should be replaced with "cos^2" - in other words the equatioin is this:



    Please verify this is what you meant.

    To demonstrate this equality, just replace each of the terms with their sine and cosine equivalents, and it falls right out.
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