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proof of Jordan's Inequality

Major Section: 
Reference
Type of Math Object: 
Proof

Mathematics Subject Classification

26D05 no label found

Comments

Nice, but how do you know the length of arc
PAQ is less than the length of arc PBQ?

Note: length of arc PAQ > PMQ
by http://planetmath.org/encyclopedia/StraightLineIsShortestCurveBetweenTwo...

but there is some work involved in that result:
(either you need to know the sup definition of arc length (= integral definition)
or you compare the integrals directly)

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