I have been trying to derive this approximation but have been unsuccessful in doing so. Any help would be greatly appreciated.
Approximation For Difference Of Two Sides Of A Triangle
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$\begingroup$
geometry
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0Please avoid forcing people to click through-take the effort to bring the problem here. – 2011-02-04
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0I think he doesnt know how to include an image in his post. – 2011-02-04