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Math Help - trigonometry C3

  1. #1
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    trigonometry C3

    Solve, for 0 θ < 360, the equation

    2 tan^2 θ + sec θ = 1

    giving your answer to 1 decimal place

    please help
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  2. #2
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    Hello,
    Quote Originally Posted by sharp357 View Post
    Solve, for 0 θ < 360, the equation

    2 tan^2 θ + sec θ = 1

    giving your answer to 1 decimal place

    please help
    Remember :

    1+\tan^2(x)=\sec^2(x)


    so your equation is :

    2\sec^2 \theta+\sec \theta-3=0

    this is a quadratic
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  3. #3
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    ok thaks, i can do this now
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