Q.If $f(x) = \begin{cases} \frac{1 - \cos 2x}{x^2} & x \ne 0 \ k & x = 0 \end{cases}$ is continuous at $x=0$ , then $k$ equals

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Q.If f(x)={1−cos⁡2xx2x≠0 kx=0f(x) = \begin{cases} \frac{1 - \cos 2x}{x^2} & x \ne 0 \ k & x = 0 \end{cases}f(x)={x21−cos2x​​x=0 k​x=0​ is continuous at x=0x=0x=0, then kkk equals