Trig INEQ

For discussing Olympiad Level Algebra (and Inequality) problems
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yo79
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Joined:Mon Feb 04, 2013 1:01 am
Trig INEQ

Unread post by yo79 » Wed Mar 06, 2013 3:40 am

Prove that in any triangle ABC we have that:
$sin(A+\frac{B}{2})+sin(B+\frac{C}{2})+sin(C+\frac{A}{2})>sinA+sinB+sinC$
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