$$\bex \frac{\tan x}{x}\nearrow. \eex$$ Ref. [Proof Without Words: Monotonicity of $\tan x/x$ on $(0,\pi/2)$, The College Mathematics Journal].
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$$\bex \frac{\tan x}{x}\nearrow. \eex$$ Ref. [Proof Without Words: Monotonicity of $\tan x/x$ on $(0,\pi/2)$, The College Mathematics Journal].
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