Question
Evaluate $\lim _{x \rightarrow \pi} \frac{1-\sin \frac{x}{2}}{\left(\cos \frac{x}{2}\right)\left(\cos \frac{x}{4}-\sin \frac{x}{4}\right)}$
Step 1
Using this formula, we can rewrite the denominator of the given expression as $\sqrt{2} \sin \left(\frac{\pi}{4} - \frac{x}{4}\right)$. Show more…
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