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Math Help - complete identity, tan

  1. #1
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    complete identity, tan

    2 tan A - (1+tan A)^2 = ?


    hmm. Do I express tan in terms of sin/cos and go from there? thanks
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  2. #2
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    Quote Originally Posted by daydreembelievr View Post
    2 tan A - (1+tan A)^2 = ?


    hmm. Do I express tan in terms of sin/cos and go from there? thanks
    Try expanding the squared term first and then simplifying .....
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