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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re: Solution

| Comment 8 of 12 |

(In reply to Solution by Praneeth)

Very impressive proof!

Posted by Charlie on 2007-11-20 09:36:16

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