[docs] [issue37548] Document range of atan, acos and asin

[Mark Dickinson]

Mark Dickinson <dickinsm at gmail.com> added the comment:

Done for 3.9; closing. Thank you for the contribution!

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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37548>
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