1. $sin\frac{A}{2}+sin\frac{B}{2}+sin\frac{C}{2}\leq \frac{1}{8}$
2. $tan^{2}\frac{A}{2}+tan^{2}\frac{B}{2}+tan^{2}\frac{C}{2}\geq 1$
3. $tan\frac{A}{2}.tan\frac{B}{2}.tan\frac{C}{2}\leq \frac{1}{3\sqrt{3}}$
4. $cosA.cosB.cosC\leq sin\frac{A}{2}+sin\frac{B}{2}+sin\frac{C}{2}$