perplexus.info :: Just Math : Any triangle, Trigonometric function

Any triangle, Trigonometric function - second episode! (Posted on 2007-11-18)

Prove that in any triangle cos(A)+cos(B)+cos(C)>1

See The Solution Submitted by Chesca Ciprian

Rating: 3.0000 (1 votes)

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Subject	Author	Date
re(2): Solution	Charlie	2007-11-21 09:10:11
No Subject	Praneeth	2007-11-21 02:50:04
Idea, observation and a nice solution!	Chesca Ciprian	2007-11-20 14:51:01
re: Solution	Brian Smith	2007-11-20 12:03:23
re: Solution	Charlie	2007-11-20 09:36:16
Solution	Praneeth	2007-11-20 06:26:28
re(3): non-Euclidean case?	brianjn	2007-11-19 07:58:10
re(2): non-Euclidean case?	Dej Mar	2007-11-19 07:33:47
re: non-Euclidean case?	brianjn	2007-11-19 06:59:34
non-Euclidean case?	Dej Mar	2007-11-19 04:50:37
computer exploration of all angles	Charlie	2007-11-18 23:16:28
non-obtuse case	Dennis	2007-11-18 15:21:40

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