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

    Mar 23, 2012, 08:17 AM
    proving trigonometric identities, prove:
    cot⁡ sin⁡ cos⁡ = 1- sin⁡ 2
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Mar 23, 2012, 08:43 AM
    Please note that this site does not let you to cut and paste math symbols from other applications - all we see is gibberish. Please resubmit and this time please type out the equation manually.

    However, I'm guessing, but if what you meant to type is this:



    then it's simply a matter of replacing cot(a) by cos(a)/sin(a), and employing the basic identity .
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