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Math Help - Fourier cosine transform

  1. #1
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    Fourier cosine transform

    Find Fourier cosine transform of exp(-ax) and hense evaluate Fourier sine transform of x.exp(-ax)

    plz help me..


    i can solve this ques. only if there is x instead of x in the exponential function exp(-ax). bcoz in this situation i can use integral formula :- ⌠exp(-ax)cos(sx)dx = exp(-ax)/a+x[bsin(sx)-acos(sx)] but what should i do if there is x in exponential function exp.??
    Last edited by jxta; December 15th 2010 at 01:42 PM.
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  2. #2
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  3. #3
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    thanks a lot zzzoak
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