- #1
chmate
- 37
- 0
Homework Statement
Find [itex]\lim_{x \to 0}\frac{1-cosxcos2xcos3x}{1-cosx}[/itex]
The Attempt at a Solution
Actually my book gives this continuation [itex]\lim_{x \to 0}\frac{1-cosx+cosx[1-cos2x+cos2x(1-cos3x)]}{1-cosx}[/itex] but I don't know how author arrived there. Can anyone explain it to me?
Thank you
Last edited: