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Math Help - Proving Trig Identities with Fundamental Identities

  1. #1
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    Proving Trig Identities with Fundamental Identities

    We just started learning about trig identities. We're supposed to prove:

    \frac{(\sec\theta - \tan\theta)^2 + 1}{\csc\theta(\sec\theta-\tan\theta)}=2\tan\theta

    I reached the point where I was left with one long expression (too long too type) all over \cos^2. I really have no idea how to solve this.

    Thanks in advance.
    Last edited by miguel11795; February 11th 2013 at 12:28 AM.
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  2. #2
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    Re: Proving Trig Identities with Fundamental Identities

    Proving Trig Identities with Fundamental Identities-solution.png
    Thanks from miguel11795
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