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Prove that in any acute-angled triangle ABC, sinA + sinB+ sinC > 2.
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Anonymous
2016-07-10 12:02:03 Post No. 153687
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Anonymous 2016-07-10 12:02:03 Post No. 153687 [Report]
Prove that in any acute-angled triangle ABC, sinA + sinB+ sinC > 2.
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Anonymous 2016-07-10 13:29:00 Post No.153714
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Anonymous 2016-07-10 13:29:00 Post No.153714 [Report]
Somehow, I can't do this..
I only manage to show that this is equivalent to proving that
>sinA + sinB + sin(A+B)>2

But I'm stuck at it. Good luck op.
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Anonymous 2016-07-10 15:03:25 Post No.153739
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Anonymous 2016-07-10 15:03:25 Post No.153739 [Report]
>>153714

Thanks anyway. Bump.
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Anonymous 2016-07-11 06:21:42 Post No.154119
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Anonymous 2016-07-11 06:21:42 Post No.154119 [Report]
http://perplexus.info/show.php?pid=5800&cid=38674
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