series expansion of cotx
he expansion for the cosx ... okay got it
but though i can do the long division to get tanx i can't for the series expansion of cotx
maybe you know much more than me
share your knowledge please (though as everyone knows it not obligatory!)
Originally Posted by pepsi
there is not a general Taylor form for cotx and tanx you can find some terms by long division as you said but there is no general form that's it .
An expansion about the origin is:
where I assume the radius of convergence is up to the next pole.