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June 2nd, 2008, 01:01 PM  #1 
Newbie Joined: Jun 2008 Posts: 15 Thanks: 0  TRIG DERIVATION QUESTION!!
Why can't I use the Difference Identity for Tan to derive its Confunction Identity??

June 2nd, 2008, 02:31 PM  #2 
Newbie Joined: May 2008 Posts: 21 Thanks: 0 
Well, that certainly would be an appealing way to proceed were it not for the fact that tan(pi/2) is undefined.


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derivation, question, trig 
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