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Math Help - 2secēθ-7=0

  1. #1
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    2secēθ-7=0

    thanks for your help!
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  2. #2
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     2\sec^2\theta-7=0

     \frac{2}{\cos^2\theta}-7=0

     \cos\theta=\pm\sqrt{\frac{2}{7}}

    Can you take it from here ?
    Last edited by mathaddict; February 11th 2009 at 02:10 AM.
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  3. #3
    Newbie geld's Avatar
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    2sec^2 \theta - 7 = 0
    sec^2 \theta = \frac{7}{2}
    cos^2 \theta = \frac{2}{7}
    cos \theta = \pm\frac{\sqrt{14}}{7}
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