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[tex]\frac{sin(\frac{n\pi}{L}-\frac{m\pi}{L})}{\frac{n\pi}{L}-\frac{m\pi}{L}}-\frac{sin(\frac{n\pi}{L}+\frac{m\pi}{L})}{\frac{n\pi}{L}+\frac{m\pi}{L}}[/tex]

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- Thread starter Xkaliber
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- #1

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[tex]\frac{sin(\frac{n\pi}{L}-\frac{m\pi}{L})}{\frac{n\pi}{L}-\frac{m\pi}{L}}-\frac{sin(\frac{n\pi}{L}+\frac{m\pi}{L})}{\frac{n\pi}{L}+\frac{m\pi}{L}}[/tex]

- #2

quasar987

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if m=n, this expression is not defined because the first denominator is 0.

Otherwise, it depends on what L, m and n are.

If you want to know if your equation is valid for any n,m, L whatever, try a numerical counter-exemple: plug say L=1.3, m=1, n=4.

Otherwise, it depends on what L, m and n are.

If you want to know if your equation is valid for any n,m, L whatever, try a numerical counter-exemple: plug say L=1.3, m=1, n=4.

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