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19 Jun 2007 04:04:11 IST
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 tan  /2. la bl =  (a 2+b 2 2lallblcos ) a2 = b2 =1=lal=lbl :. we get =  ( tan 2/2) |
Himanshu Jain
P.E.C.
http://jainhim.blogspot.com/ |
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