## Question

###### Show that if $ riangle$ satisfies the 1 Lagrange equations, it identically satisfies $E_{4}$. (7.161) on the basis of the homogeneity of $A$. by explicitly forming the total derivative with respect to $ heta$ that occurs in the equation.

Show that if $\triangle$ satisfies the 1 Lagrange equations, it identically satisfies $E_{4}$. (7.161) on the basis of the homogeneity of $A$. by explicitly forming the total derivative with respect to $\theta$ that occurs in the equation.

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