Commit ad67ba18 authored by Claude Meny's avatar Claude Meny

Update cheatsheet.fr.md

parent a9edc4ed
Pipeline #15983 canceled with stage
......@@ -257,7 +257,7 @@ $`\;=A\cdot\dfrac{(cos\,N\phi-1)+i\,sin\, N\phi}{(cos\,\phi-1)+i\,sin\,\phi}`$
L'**intensité résultante** est alors
$`I_{tot}=\underline{A_{tot}}\,\underline{A^*_{tot}}=|\,\underline{A}_{tot}\,|^2`$
$`I_{tot}=\underline{A_{tot}}\,\underline{A^*_{tot}}=|\,\underline{A_{tot}}\,|^2`$
$`=A^2\cdot\dfrac{(cos\,N\phi-1)^2+sin^2\,N\phi}{(cos\,\phi-1)^2+sin^2\,\phi}`$
$`I_{tot}=A^2\cdot\dfrac{1-2\cos\,N\phi+cos^2\,N\phi+sin^2\,N\phi}{1-2\cos\,\phi+cos^2\,\phi+sin^2\,\phi}`$
......
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