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Math Help - Reinmann sum problem?

  1. #1
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    Reinmann sum problem?

    Problem is: The temperature of a town t months after January can be estimated by the function f(t) = -23\cos(t\pi/6) + 79
    Find the average temperature from month 5 to month 9

    I really just have no idea where to start on this one. Maybe a Reinmann sum and divide by 5?
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  2. #2
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    So the f(t) is the tangent line of anytime t months after January.

    Take the integral of it from 5 to 9, and do 1/(9-5) * result for average

    Reason being is Integral ( f(t) ) gives you the total temperature during those months, and 1/(9-5) is the average of them
    Last edited by pcannons; February 11th 2010 at 07:31 PM. Reason: Explanation
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  3. #3
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    Oh yea that makes sense. Thanks, it worked.
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