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    Segs10's Avatar
    Segs10 Posts: 1, Reputation: 1
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    #1

    Nov 22, 2010, 06:24 PM
    tanx cotx = 1/2csc2x?
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    Nov 22, 2010, 06:33 PM

    The left side is equal to 1.













    But, in general:



    and


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