Integrating sin(x) exp(sin(x))

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The discussion centers on finding an analytic solution for the integral ∫sin(x/a) exp(b sin(x/a)) dx. User James reports unsuccessful attempts using integration by parts and other standard techniques. The consensus is that while the integral can be expressed as an infinite series, it cannot be represented in a closed form using elementary or current special functions.

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james7henderso
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Hello Physics Forum,

I am trying to find an analytic solution to an equation of the form ∫sin(x/a) exp(b sin(x/a)) dx. I have tried integration by parts and all the usual tricks but can't seem to get anywhere

Thanks in advance for your help

James
 
Physics news on Phys.org
You can express the undefined integral on the form of an infinite series, but not on a closed form with the elementary and current special functions.
 

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