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lim(xto(pi)) (1-sin(x/2))/(cos(x/2)(cos(...

`lim_(xto(pi)) (1-sin(x/2))/(cos(x/2)(cos(x/4)-sin(x/4)))`

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To evaluate the limit \[ \lim_{x \to \pi} \frac{1 - \sin\left(\frac{x}{2}\right)}{\cos\left(\frac{x}{2}\right) \left(\cos\left(\frac{x}{4}\right) - \sin\left(\frac{x}{4}\right)\right)}, \] we will follow these steps: ...
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