What is the Fourier Transform of $\cos(\sqrt{r^2-t^2})$ where r is a constant and t represents time. Please Help.
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3If you mention a few things you tried you're sure to get help. – daniel Mar 14 '13 at 12:27
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Well I wrote down $\int_{-\infty}^{\infty}\cos(\sqrt{r^2-t^2})e^{-2\pi jft}dt$ and then tried to use the cos exponential identity which did not help much, hope this helps. – trienko Mar 14 '13 at 13:58
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Where did this problem come from? – Mhenni Benghorbal Mar 15 '13 at 13:41