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Math Help - Horrible tan equation

  1. #1
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    Question Horrible tan equation

    3960\,\arctan \left( {\frac {2255}{12}}\,{\frac {1}{\sqrt {-13530\,c}}<br />
} \right) {\frac {1}{\sqrt {-13530\,c}}}=17<br />

    Assuming c is negative.

    Okay, I've been working on this for some time now. The equation is part of a bigger problem. I just need a value for c. I know it's about -2.5 by using a numerical method. Does anyone see how this could be solved algebraically?

    Thanks
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  2. #2
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    Quote Originally Posted by sam45 View Post
    Does anyone see how this could be solved algebraically?

    Thanks
    Not I, numerical method it is.
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