Q.If $f(x) = \begin{cases} \frac{\sin 3x}{x} & x \ne 0 \ k & x = 0 \end{cases}$ is continuous at $x=0$ , then $k$ equals

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Q.If f(x)={sin⁡3xxx≠0 kx=0f(x) = \begin{cases} \frac{\sin 3x}{x} & x \ne 0 \ k & x = 0 \end{cases}f(x)={xsin3x​​x=0 k​x=0​ is continuous at x=0x=0x=0, then kkk equals