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septimus

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28 reputation
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4 Questions

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3
 Find the maximum value of $T=\frac{2}{3}(\cos 2A-\cos 2B)-\tan\frac{C}{2}$
1
 Find the maximum and minimum values of $$A=\frac{y}{x}-\frac{x}{y}+\frac{z}{y}-\frac{y}{z}+\frac{x}{z}-\frac{z}{x}$$
0
 Find the maximum value of $M=\frac{80a^3}{27}+\frac{9b^3}{4}+\frac{abc}{2}$
0
 Prove that $x-\mid y\mid\le\left|\frac{x-y}{1-xy}\right|<1$

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+15 Find the maximum value of $T=\frac{2}{3}(\cos 2A-\cos 2B)-\tan\frac{C}{2}$
+3 Prove that $x-\mid y\mid\le\left|\frac{x-y}{1-xy}\right|<1$
+5 Find the maximum and minimum values of $$A=\frac{y}{x}-\frac{x}{y}+\frac{z}{y}-\frac{y}{z}+\frac{x}{z}-\frac{z}{x}$$

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