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Math Help - find the exact value

  1. #1
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    find the exact value

    find the exact value-tttttttttt.png


    pls show your answers for me to know if im correct

    mine is

    a. -24/25
    b. 7/25
    c. 24/7
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  2. #2
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    I don't think this is possible, since cosine is negative in the third quadrant and B is in the third quadrant...
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