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Question Number 97238 by bobhans last updated on 07/Jun/20

Commented by john santu last updated on 07/Jun/20

$$\underset{x\to 0}{\lim }\frac{\tan {}^{2}x(\cos {}^{2}x-1)}{(1+\frac{x^2}{4}-1)(1-\frac{\sin {}^{2}x}{2}-1)}=$$$$\underset{x\to 0}{\lim }\frac{-x^4}{-\frac{1}{8}{x}^4}=8$$

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