[Steps Shown] a) Explain why 1 / 2-fracx^224 b) what does the inequality say about limit (1- cos x)/(x \rightarrow 0)


Question: a) Explain why \(1 / 2-\frac{x^{2}}{24}<\frac{1-\cos x}{x^{2}}<\frac{1}{2}\) for \(x \neq 0\)

b) what does the inequality say about limit \(\frac{1-\cos x}{x \rightarrow 0} \frac{x^{2}}{2}\)

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