Why is the domain of arctan power series |x|<=1?(adsbygoogle = window.adsbygoogle || []).push({});

i understand why a power series has the domain |x|<1, but why is the power series of arctan |x|<=1?

thanks!

also, why are domains of the taylor expansions of coshx and sinhx: for all x?

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# Why is the domain of arctan power series |x|<=1?

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