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hp-zl · (This post was last modified: 01-08-2024 08:48 AM by hp-zl.)

All the best in the New Year.

Now to the point.
HP-G2, firmware 2.1.14730 (2023 04 13)
CAS Mode

I type:
series(acot(x),x,0,6)
I receive:
order_size(x)

But it should be:
π/2 - x + x^3/3 - x^5/5

Writing:
series(atan(x),x,∞,6)

I get the correct result:
π/2 - 1/x + (1/x)^3/3 - (1/x)^5/5 + (1/x)^7*order_size(1/x).

Is it only like this for me or also for you?
Regards.