Write the Word or Phrase That Best Completes Each Statement $\lim _{x \rightarrow \frac{\pi}{2}} \frac{\cos x}{4 x-2 \pi}$

Short Answer

Write the word or phrase that best completes each statement or answers the question.
- $\lim _{x \rightarrow \frac{\pi}{2}} \frac{\cos x}{4 x-2 \pi}$