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Integral of sin(x)/x | Theoretical Physics and Related Math

There is cute formula that reads $latex \int_{-\infty}^{\infty} \dfrac{\sin x}{x} dx = \pi$. To derive this, note that $latex \sin x$ is the imaginary part of $latex e^{ix}$. Thus we consider the integral of $latex e^{ix}/x$ in...

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