Answers edited by Eric S.
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What is the arclength of #r=-2sin(theta/4+(7pi)/8) # on #theta in [(pi)/4,(7pi)/4]#?
What is the arc length of the curve given by #r(t)= (1,t,t^2)# on # t in [0, 1]#?
How do I integrate?
How I solve this integral?