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**1. The problem statement, all variables and given/known data**

http://i45.tinypic.com/20rsnis.jpg

**2. Relevant equations**

Compute the lim

**3. The attempt at a solution**

I tried using l'Hopital's rule but I have to keep finding the derivative and it doesnt yield an answer. I have to use taylor series for the trig functions, but don't know how this will work