October 13th, 2014, 07:49 AM  #1 
Newbie Joined: Oct 2014 From: macau Posts: 4 Thanks: 0  About implicit diff. problem
Here again~I need your help~ a implicit diff. $\displaystyle c^2=a^2+b^2(2ab)\cosθ ，\frac{da}{db}=?$ Last edited by skipjack; October 13th, 2014 at 10:04 AM. 
October 13th, 2014, 08:18 AM  #2  
Math Team Joined: May 2013 From: The Astral plane Posts: 2,226 Thanks: 908 Math Focus: Wibbly wobbly timeywimey stuff.  Quote:
Dan Last edited by skipjack; October 13th, 2014 at 10:05 AM.  

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