- #1

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Not homework, just trying to learn how to solve this problem for an exam.

https://dl.dropbox.com/u/23889576/Screenshots/10.png [Broken]

[itex]\int_{a}^{b} \sqrt { (\frac{dr}{dθ})^2 + r^2 }\, dθ[/itex]

Had much difficulty, could not even derive the original derivative function for this problem.

## Homework Statement

https://dl.dropbox.com/u/23889576/Screenshots/10.png [Broken]

## Homework Equations

[itex]\int_{a}^{b} \sqrt { (\frac{dr}{dθ})^2 + r^2 }\, dθ[/itex]

## The Attempt at a Solution

Had much difficulty, could not even derive the original derivative function for this problem.

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