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Thread: trigonometry C3

  1. Nov 16th 2008, 02:44 AM #1
    sharp357
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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. Nov 16th 2008, 02:52 AM #2
    Moo
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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. Nov 16th 2008, 03:01 AM #3
    sharp357
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    ok thaks, i can do this now
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