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Math Help - improper integral evaluation

  1. #1
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    improper integral evaluation

    Just a quick question. I have a calculus exam in two days and this was one of the sample exam questions. It's part of a section on differentiation through an integral sign.

    I need to show that the integral from 0 to infinity of sin(x)/x dx = (pi/2).
    I can't figure out the integral of sin(x)/x so how do I solve this?
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  2. #2
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    Quote Originally Posted by PvtBillPilgrim View Post
    Just a quick question. I have a calculus exam in two days and this was one of the sample exam questions. It's part of a section on differentiation through an integral sign.

    I need to show that the integral from 0 to infinity of sin(x)/x dx = (pi/2).
    I can't figure out the integral of sin(x)/x so how do I solve this?

    I have seen this before.
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