In this recent post, TwistedOne151 was able to easily deduce that:
...based on his knowledge that:
So, apparently I should know at least that series--but what others should I learn? Is there perhaps an online table of taylor/maclaurin series that I should commit to memory?
Also--and this is just a random question from that same thread--how did he go from here:
...? Is that some kind of identity I should know?