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    rmacgilvary's Avatar
    rmacgilvary Posts: 3, Reputation: 1
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    #1

    Apr 17, 2013, 07:44 AM
    verify the trigonometry identity
    sec^2(u) - cos(u)sec(u) = cot^2(u)
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Apr 17, 2013, 08:33 AM
    As usual for this type of problem, the first thing you should do is convert the secant and cotangent terms to their sine and cosine equivalents. Then simplify. Look for opportunities to apply well known identities such as sin^2u + cos^2u = 1.
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