Prove that
$1-x/3\le\frac{\sin x}x\le1.1-x/4, \forall x\in(0,\pi]$
1
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Prove that
$$1- \frac{x}{3} \le \frac{\sin x}x \le 1.1 - \frac{x}{4}, \quad \forall x\in(0,\pi].$$
calculus
real-analysis
algebra-precalculus
inequality
contest-math
asked
2012-10-26
user id:44596
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