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Acute triangle, Trigonometric function! (
Posted on 20071013
)
Prove that in an acute triangle sin(A) + sin(B) + sin(C) > 2
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Submitted by
Chesca Ciprian
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Hint
 Comment 3 of 9 
If the semiperimeter of an acute triangle is greater than the diameter of its circumcircle, then sin(A) + sin(B) + sin(C) > 2 follows from the rule of sines.
Posted by
Bractals
on 20071013 19:41:08
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