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June 6th, 2011, 09:42 AM  #1 
Member Joined: Apr 2011 From: Sri Lanka Posts: 71 Thanks: 1  what is the formula for Tan (A)Tan (B) ?
what is the formula for Tan (A)Tan (B) and Cot (A)  Cot(B)

June 6th, 2011, 10:01 AM  #2  
Math Team Joined: Dec 2006 From: Lexington, MA Posts: 3,267 Thanks: 407  Re: what is the formula for Tan (A)Tan (B) ? Hello, silvercats! Quote: Are these what you're looking for?  
June 6th, 2011, 06:56 PM  #3  
Member Joined: Apr 2011 From: Sri Lanka Posts: 71 Thanks: 1  Re: what is the formula for Tan (A)Tan (B) ? Quote:
 
June 6th, 2011, 08:34 PM  #4 
Senior Member Joined: Apr 2007 Posts: 2,140 Thanks: 0 
tan A  tan B = (1 + tan A tan B)tan(A  B)

June 7th, 2011, 02:10 AM  #5 
Member Joined: Apr 2011 From: Sri Lanka Posts: 71 Thanks: 1  Re: what is the formula for Tan (A)Tan (B) ?
That is what I as looking for.Thanks for both of you 

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