How do I write a derivation of the cosine power series?(adsbygoogle = window.adsbygoogle || []).push({});

(I understand and can derive it, but it takes much space and is disjointed! :grumpy: ; how do you write the shortest and fastest derivation for it--briefly and fluently??)

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Derivation of Power Series

**Physics Forums | Science Articles, Homework Help, Discussion**