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El_Arrow
 one year ago
stuck in arc length problem
El_Arrow
 one year ago
stuck in arc length problem

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El_Arrow
 one year ago
Best ResponseYou've already chosen the best response.0how does it get the 2650/4 + 441x/4?

El_Arrow
 one year ago
Best ResponseYou've already chosen the best response.0im getting 1325/2 on my calculator

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1434600730609:dw

El_Arrow
 one year ago
Best ResponseYou've already chosen the best response.0but then why didnt the person put 1325/2 in the problem?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0it looks like they wanted to pull the 1/4 out from under the radical.

El_Arrow
 one year ago
Best ResponseYou've already chosen the best response.0like how did he get the 3+y=(1/8)tangent(theta)?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0that's a trig substitution from right angle trig. basically if you have an integral of the form \[\sqrt{b^2+a^2x^2}\]you can make the substitution x = (a/b) tan Θ

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I reversed that. x = (b/a) tan Θ

El_Arrow
 one year ago
Best ResponseYou've already chosen the best response.0so the x is (3+y), the b is 1 and a is 8? right?
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