Integral of sin(x)/x
Date: 8/29/96 at 2:17:18 From: Anonymous Subject: sin(x)/x Would you care to comment on the existence of a symbolic (not a numerical method) solution to the definite integral of sin(x)/x over, say, 0 to infinity?
Date: 8/30/96 at 10:30:58 From: Doctor Jerry Subject: Re: sin(x)/x The function Si(x) = integral from 0 to x of (sin(w)/w) dw is a well known function. It is called the sine integral. To evaluate Si(x) for any real x requires some kind of numerical procedure. You may refer to such books as Handbook of Mathematical Functions, edited by Milton Abramowitz and Irene A. Stegun, where this function is tabulated. They give the value pi/2 for the limit of Si(x) as x approaches infinity. If you want to read a symbolic solution, see page 42-42 in Titchmarsh' Theory of Functions. -Doctor Jerry, The Math Forum Check out our web site! http://mathforum.org/dr.math/
Search the Dr. Math Library:
Ask Dr. MathTM
© 1994-2013 The Math Forum