ABC-acute triangle. prove that sinA+sinB>cosA+cosB+cosC

thanks

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- Sep 1st 2008, 05:52 AMely_ena trigonometric inequality
ABC-acute triangle. prove that sinA+sinB>cosA+cosB+cosC

thanks - Sep 1st 2008, 10:20 PMNonCommAlg
- Sep 2nd 2008, 01:06 AMely_en
- Sep 2nd 2008, 01:16 AMMoo