Commit 7657ca66 authored by Claude Meny's avatar Claude Meny

Update textbook.fr.md

parent 0c667222
Pipeline #2877 failed with stage
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...@@ -46,7 +46,7 @@ $`dl=\sqrt{dx^2+dy^2+dz^2}`$ ...@@ -46,7 +46,7 @@ $`dl=\sqrt{dx^2+dy^2+dz^2}`$
$`M=M(\rho, \phi, z)`$ $`M=M(\rho, \phi, z)`$
$`dl=\sqrt{d\rho^2+ (\rho d\phi)^2+dz^2}`$ $`dl=\sqrt{d\rho^2+ (\rho\,d\phi)^2+dz^2}`$
...@@ -57,6 +57,6 @@ $`dl=\sqrt{d\rho^2+ (\rho d\phi)^2+dz^2}`$ ...@@ -57,6 +57,6 @@ $`dl=\sqrt{d\rho^2+ (\rho d\phi)^2+dz^2}`$
$`M=M(\rho, \theta, \phi)`$ $`M=M(\rho, \theta, \phi)`$
$`dl=\sqrt{d\rho^2+\rho d\phi^2+dz^2}`$ $`dl=\sqrt{dr^2+(r\,d\theta)^2+(r\,sin\,\theta\,d\phi)^2}`$
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