APFIVE Trigonometric Limit at Zero
Solve the equation: $$\lim_{x\to0}\frac{1-\cos(4*x)}{x^2}$$.
A
$$8$$
B
$$4$$
C
The limit is infinite due to division by zero if the small-angle approximation is not applied, but correctly using the Taylor expansion shows a finite result.
D
$$16$$
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