In the example shown below, I need to know how dy(the numerator portion of the integral) gets converted into x sec²θdθ.
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Perhaps $r=x \sec \theta$ and $y=x \tan \theta$? – Sep 06 '17 at 12:48
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Welcome to MSE. Please use MathJax. – José Carlos Santos Sep 06 '17 at 12:55
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Kevin, thanks for pointing that out – R SMITH Sep 06 '17 at 13:58