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Math Help - Proof of trig identity HELPP !

  1. #1
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    Proof of trig identity HELPP !

    tanA/(secA-1) - tanA(secA+1) = 2cotA

    please helppp !!! keep gettin stuckkkk !!

    any help greatly appreciateddd !
    thankuu !!
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  2. #2
    MHF Contributor alexmahone's Avatar
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    tan A[\frac{1}{sec A-1}-\frac{1}{sec A+1}]
    =tan A[\frac{2}{sec ^2A-1}]
    =tan A[\frac{2}{tan^2A}]
    =2cot A
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  3. #3
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    THANKS alexmahone!
    appreciate it =D
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