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Evaluate the limit of $\frac{1-\cos\left(x\right)}{x^2}$ as $x$ approaches 0

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$\lim_{x\to\:0}\left(\frac{1-\cos\left(x\right)}{x^2}\right)$

Main topic:

Limits

Related formulas:

7. See formulas

Time to solve it:

~ 0.04 s (SnapXam)