How would one go about obtaining a closed form for the $n$-th derivative of $\frac{\sin(x)}{x}$ I took a few of the derivatives but didn't see any immediate pattern.
There may be some obvious thing I'm missing, or overthinking it.
How to find $\lim_{h\rightarrow 0}\frac{\sin(ha)}{h}$ without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...
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