$2-$arclength$-1$

Consider the curve given by

$f(x)=2cos(1\mathrm{.}1x)$

on the interval $0x2.$

Fill in the expression which would complete the integral determining the arc length of this curve on $0x2.$

${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}{0}^{2n}$

$dx$

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