- #1
El Moriana
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Homework Statement
My textbook [Engineering Mathematics, Stroud, 6th Edition, page932] runs through the derivation of the integral formula for arc length. I got confused at one of the steps:
[partial](ds/dx)=sqrt(1+([partial](dy/dx))^2)
if [partial]dx tends to 0,
ds/dx=sqrt(1+log(dy/dx)^2)
s=intab(sqrt(1+(dy/dx)^2))
Where does the log come from and where does it go?
Homework Equations
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The Attempt at a Solution
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