Question:
Mark $(\sqrt{)}$ against the correct answer in the following:
If the function $f(x)=\left\{\begin{array}{c}\frac{k \cos x}{(\pi-2 x)}, \text { when } x \neq \frac{\pi}{2} \\ 3, \text { when } x=\frac{\pi}{2}\end{array}\right.$ be continuous at $x=\frac{\pi}{2}$, then the value of $k$ is
A. 3
B. $-3$
C. $-5$
D. 6
Solution:
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