Jordan’s inequality

Jordan’s Inequality states that

$$\frac{2}{\pi }x\le \sin (x)\le x$$

for all $x\in [0,\frac{\pi }{2}]$.

Title	Jordan’s inequality
Canonical name	JordansInequality
Date of creation	2013-03-22 11:42:29
Last modified on	2013-03-22 11:42:29
Owner	Koro (127)
Last modified by	Koro (127)
Numerical id	25
Author	Koro (127)
Entry type	Theorem
Classification	msc 00A99
Classification	msc 26D05
Related topic	ComparisonOfSinThetaAndThetaNearTheta0