- #1

spacetimedude

- 88

- 1

But on the same chapter in the lecture notes, there is an example solving for the Fourier transform of [itex]f(x)=(\delta(x+d))+(\delta(x-d))[/itex].

I set the transform as [tex]F(k)= \int_{-\infty}^{\infty} e^{-ikx}(\delta(x+d))+(\delta(x-d))dx[/tex]Splitting the integral into two and using the sifting property, I got [tex]F(k)=e^{ikd}+e^{-ikd}[/tex] But the solution has [itex]\frac{1}{\sqrt{2\pi}}[/itex] in front, hence from there they used the trig identity to get it in terms of cosine.

I searched on google and there seems to be different conventions on the transform. But I am only familiar with the one I mentioned. How can I get to the solution using the integral form I used?