November 13th, 2008, 04:18 PM  #1 
Senior Member Joined: Sep 2008 Posts: 199 Thanks: 0  half angle ..
show that tan 22.5 = square root 2 1 thanks for any help .. 
November 13th, 2008, 05:21 PM  #2 
Senior Member Joined: Jul 2008 Posts: 895 Thanks: 0  Re: half angle ..
Google: Half angle formula.

November 13th, 2008, 06:12 PM  #3 
Senior Member Joined: Oct 2007 From: Chicago Posts: 1,701 Thanks: 3  Re: half angle ..
It may help to remember that tan(x) = sin(x)/cos(x)

November 13th, 2008, 06:52 PM  #4  
Senior Member Joined: Jul 2008 Posts: 895 Thanks: 0  Re: half angle .. Quote:
 
November 14th, 2008, 01:46 AM  #5 
Newbie Joined: Nov 2008 Posts: 3 Thanks: 0  Re: half angle ..
wait ..

November 14th, 2008, 02:18 AM  #6 
Senior Member Joined: Sep 2008 Posts: 199 Thanks: 0  Re: half angle ..
alright i got it .. thx all


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