(adsbygoogle = window.adsbygoogle || []).push({}); nth derivative!!!!!

I have a quick question...

what is the nth derivative of cos(X)?? I have written out the derivatives up to the 4th one...it being cos(X) as well, but i don't see the pattern for the nth because it continues to change between sin and cos. I'm doing this for Taylor Series. Thanks for any help.

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

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

# Nth derivative

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