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    kosmo15's Avatar
    kosmo15 Posts: 1, Reputation: 1
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    #1

    Nov 7, 2011, 04:52 PM
    Verify the identity
    (2cotx)/(cotx tan x) = 2cos(squared)x
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Nov 7, 2011, 10:27 PM
    Convert the cot and tan ratios on the left to sine and cosine ratios. Then try to remove the denominator on the left.
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