hi everyone!

needed some help on two questions.

1. Find the first 3 non-zero terms in the series for $\displaystyle secx$

2. Assuming the series for $\displaystyle e^x$ and $\displaystyle tanx$, determine the series for $\displaystyle e^xtanx$ up to and including the term in $\displaystyle x^4$

thank you.