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Math Help - Trig Puzzle

  1. #1
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    Trig Puzzle

    Someone showed me a puzzle that I couldn't figure out how to solve. At first it seemed easy, but I ended up getting stumped. Can someone walk me through this?
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  2. #2
    MHF Contributor MarkFL's Avatar
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    Re: Trig Puzzle

    Hint: look at the other diagonal of the rectangle.
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  3. #3
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    Re: Trig Puzzle

    Hahahahahahaha. My oh my am I tired....
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  4. #4
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    Re: Trig Puzzle

    I was actually going into the law of cosines...
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