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# How do yous how that the other stationary value of x satisfies the equation tan x=2/x?

## given y= $2 {x}^{2} \cos x$ and 0 is less than or equal to x which is less than or equal to $\frac{\pi}{2}$. 0 is a stationary value of x. Show that the other stationary value of x satisfies the equation tanx = $\frac{2}{x}$

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