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![[Post New]](/templates/default/images/icon_minipost_new.gif) 1 Mar 2008 12:12:29 IST
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cotxcot2x - cot2xcot3x- cot3xcotx = 1 prove
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<DIV ALIGN="right">Glitter Graphics</DIV></TD></TR></TABLE>
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3x=2x+x
cot(2x+x)= (cot 2x.cotx-1)/(cot2x+cotx)
rearrange..
easy ques.
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1 Mar 2008 12:27:26 IST
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Thanks
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