Question: how do i find curve length in 2D coordinate

hey guys i'm new to maple i'd search the forum but i don't find any solution about my problem

how we can calculate the length of a cure like this:

y=f(x)

f(x)=sin(cos(x+Pi))

from point1={Pi,f(Pi)} to point2={(5*Pi/3),f(5*Pi/3)}

please help me

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