Feynman Trick for the integral of (sin x)/x

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The antiderivative of sinx/x cannot be expressed in basic functions. However, the definite integral from 0 to infinity can be calculated, using Feynman trick.
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As always, a fantastic explanation. I always go into a video with Prof. Daniel intending to learn one idea, but I always leave having learned a bunch more.

MohdAbuolwan
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We need to show I is continuous at 0. Our integral is not absolutely convergent for s=0, so this requires an argument.

roderictaylor
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What us this tabulation trick? Is that just integration by parts via some set of rules?

wayneosaur
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