May 9th, 2017, 12:17 PM  #1 
Member Joined: Feb 2017 From: henderson Posts: 36 Thanks: 0  confused on derivative rules
so I have ln(cos(w1)) dont I use chain rule can somebody do a step by step? 
May 9th, 2017, 12:24 PM  #2 
Math Team Joined: Dec 2013 From: Colombia Posts: 7,599 Thanks: 2587 Math Focus: Mainly analysis and algebra 
Yes, you do use the chain rule. What is the chain rule? And how do you imagine that it might be applied here? 
May 9th, 2017, 12:35 PM  #3 
Member Joined: Feb 2017 From: henderson Posts: 36 Thanks: 0  
May 9th, 2017, 12:51 PM  #4 
Senior Member Joined: Sep 2015 From: USA Posts: 2,311 Thanks: 1224  

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