Using the definition, show that U_n =Σ_(k=1) ^n ((sin(k))/(k!)) is a sequence of Cauchy.


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Question Number 164477 by mathocean1 last updated on 17/Jan/22

$U s i n g t h e d e f i n i t i o n, s h o w t h a t$ $U_{n} = \underset{k = 1}{\sum^{n}} \frac{s i n (k)}{k!} i s a s e q u e n c e o f C a u c h y .$
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