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well I thought R and r are international symbols, but anyway I still have time left till monday to do this assignment, so please help!
Hello everybody. Two days ago I my maths teacher gave me time until tomorrow morning to solve the following exercise:
1. Show that in every triangle there is:
cos A + cos B + cos C < 1
a(b+c) b(c+a) c(a+b) 8Rr
But most importantly explain in a few words how you managed to solve it, please
Thank you in advance!
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