The picture in the addition, you see one integral equation and I have

opeth_35
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The picture in the addition, you see one integral equation and I have moved forward to solve it but when I tried to use patial integrant ( uv-∫v.du) I couldn't go further, Is there anyone to help me solving that equation.Actually, I stuck while putting the boundries
(from 0 to ∞ ) because it is not clear when sinus function goes ∞ what it will be,... anyway if you look at it you will see what I mean.

thanks
 

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th answer is (a*a)/(2*(1+a*a))
 


I think most people think that doesn't worth to give any answer to this easy question· i understand now
 

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