I misread the question, and made a typo. It should be two. Although, I would suggest you look at Unbeatable's solution. He didn't take the easy way out and use Maclaurin.
What is the general formula of Mac. series for tanx?
i.e: the formula contains Sigma
I know it for arctan x
not tan x
It's crazy and involves Bernoulli numbers. It's not worth remembering, but just do the calculation three times (the second one vanishes) and remmeber that.