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Math Help - Help with integrals and Riemanns sum

  1. #1
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    Help with integrals and Riemanns sum

    Help with integrals and Riemanns sum-capture2222.jpg
    Can anyone explain these two problems to me?
    Edit: So I figured out how to do number 4, you just differentiate the second equation to show that it is equal to the first. So I'm good on number 4.
    Last edited by erstwhile; February 24th 2014 at 09:19 PM.
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  2. #2
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    Re: Help with integrals and Riemanns sum

    Well if the sum is a Riemann Sum, it is the same as a particular definite integral. What function do you think is being integrated?
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  3. #3
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    Re: Help with integrals and Riemanns sum

    so we're integrating sin(x) from 0 to pi/2? Is that what it means by evaluating the limit? so -cos(pi/2) - -cos (0)?
    Last edited by erstwhile; February 25th 2014 at 06:18 AM.
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    Re: Help with integrals and Riemanns sum

    Yes, that is correct.

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