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Math Help - Related Rates (?)

  1. #1
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    Smile Related Rates (?)

    Hi there. I wonder if anyone can help me understanding and solving this?

    Thank you!

    The minute hand on a clock is 8 cm long and the hour hand is 5 cm long. Give an expression for d, the distance between the tips of the hands, in terms of a, the angle between the hands.
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  2. #2
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    The minute hand on a clock is 8 cm long and the hour hand is 5 cm long. Give an expression for d, the distance between the tips of the hands, in terms of a, the angle between the hands.
    law of cosines ...

    d = \sqrt{8^2 + 5^2 - 2(8)(5)\cos{a}}
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  3. #3
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    You and mvho in the same class or something? This is very similar to the first problem in this thread: http://www.mathhelpforum.com/math-he...-problems.html . Same variables, too!


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