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

    May 27, 2013, 10:24 PM
    proving trigonometric identities solver
    cot(x)-cot(2x)=csc(2x)

    Prove.
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    May 28, 2013, 04:48 AM
    As usual for this type of problem, start by converting the cot(x) functions to sin(x) and cos(x) equivalents, then look for ways to simplify. You will have to apply identities for cos(2x) and sin(2x). Post back with your attempt and we'll help if you get stuck.
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