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Math Help - writing in terms of theta

  1. #1
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    writing in terms of theta



    I'm not sure how to do this one.
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  2. #2
    Behold, the power of SARDINES!
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    Quote Originally Posted by Neverending View Post


    I'm not sure how to do this one.
    x=3\sin(\theta) \implies \sin(\theta)=\frac{x}{3}

    writing in terms of theta-capture.jpg

    Using the pythagorean theorem we get the unknown side of the triangle as \sqrt{9-x^2}

    So we get that

    \cos(\theta) =\frac{\sqrt{9-x^2}}{3} \implies \sqrt{9-x^2}=3\cos(\theta)
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  3. #3
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    wow i've never done something like this before. Thanks for showing me the method!
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